You're right, there are errors in the logs. Doh me for not checking first.
Here's what /var/log/httpd/error_log reports when I try to install fop2admin module:

[Fri Aug 12 13:03:13 2011] [error] [client 192.168.1.9] PHP Notice:  Undefined offset:  500 in /var/www/html/admin/modules/fop2admin/functions.inc.php on line 427, referer: http://miniliz/admin/config.php
[Fri Aug 12 13:03:13 2011] [error] [client 192.168.1.9] PHP Notice:  Undefined offset:  501 in /var/www/html/admin/modules/fop2admin/functions.inc.php on line 427, referer: http://miniliz/admin/config.php
[Fri Aug 12 13:03:13 2011] [error] [client 192.168.1.9] PHP Notice:  Undefined offset:  502 in /var/www/html/admin/modules/fop2admin/functions.inc.php on line 427, referer: http://miniliz/admin/config.php
[Fri Aug 12 13:03:13 2011] [error] [client 192.168.1.9] PHP Notice:  Undefined offset:  503 in /var/www/html/admin/modules/fop2admin/functions.inc.php on line 427, referer: http://miniliz/admin/config.php
[Fri Aug 12 13:03:13 2011] [error] [client 192.168.1.9] PHP Notice:  Undefined offset:  504 in /var/www/html/admin/modules/fop2admin/functions.inc.php on line 427, referer: http://miniliz/admin/config.php
[Fri Aug 12 13:03:13 2011] [error] [client 192.168.1.9] PHP Notice:  Undefined offset:  500 in /var/www/html/admin/modules/fop2admin/functions.inc.php on line 427, referer: http://miniliz/admin/config.php
[Fri Aug 12 13:03:13 2011] [error] [client 192.168.1.9] PHP Notice:  Undefined offset:  501 in /var/www/html/admin/modules/fop2admin/functions.inc.php on line 427, referer: http://miniliz/admin/config.php
[Fri Aug 12 13:03:13 2011] [error] [client 192.168.1.9] PHP Notice:  Undefined offset:  502 in /var/www/html/admin/modules/fop2admin/functions.inc.php on line 427, referer: http://miniliz/admin/config.php
[Fri Aug 12 13:03:13 2011] [error] [client 192.168.1.9] PHP Notice:  Undefined offset:  503 in /var/www/html/admin/modules/fop2admin/functions.inc.php on line 427, referer: http://miniliz/admin/config.php
[Fri Aug 12 13:03:13 2011] [error] [client 192.168.1.9] PHP Notice:  Undefined offset:  504 in /var/www/html/admin/modules/fop2admin/functions.inc.php on line 427, referer: http://miniliz/admin/config.php
[Fri Aug 12 13:03:13 2011] [error] [client 192.168.1.9] PHP Fatal error:  Call to undefined function queues_list() in /var/www/html/admin/modules/fop2admin/functions.inc.php on line 1310, referer: http://miniliz/admin/config.php

These numbers, 500 to 504, represent Ring Groups I have defined.

A search for the queues_list function returns only one instance of it:

[root@ddnpbx html]# find /var/www/html | xargs grep queues_list
/var/www/html/admin/modules/fop2admin/functions.inc.php:        $results = queues_list(true);
[root@ddnpbx html]#

I installed the Queues module and now the fop2admin module installs! Hum, so you may want to put a note in the documentation that the Queues module must be installed to install fop2admin module. This particular system doesnt have Queues, nor does a stock install of AsteriskNow include the Queues module.

This is Freepbx 2.7.0.10.
I just tried nuking the database entries along with reinstalling the tarball to start over. No luck. The fop2admin module wont get installed. I do have a valid voicemail entry.

Running autoconfig-users-freepbx.sh only returns a single line with buttonfile=autobuttons.cfg.

If it's associated, I havent been able to install the freepbx module. The module admin will upload the module, but when I try to install it, it just sits there with the orange box saying "Please wait while module actions are performed"

I have a freshly installed FOP2 setup on a Centos5.6+Asterisk1.8.5.0+FreePBX2.7.0.10 but I cannot get the clients to log in.

I've disabled FOP1 and the FOP2 servers starts up just fine with no noticeable error messages. But when I point a client browser to http://blah/fop2 and enter known extension credentials to log in, nothing happens and it prompts for credential again.

Here's the output when running fop2_server -X 15 and attempting to connect several times from another machine:

** CLEAN SOCKET  connection lost removing socket IO::Socket::INET=GLOB(0xa685260)
** CLEAN SOCKET  flash client connection lost
No flash clients connected

192.168.1.104   => <?xml version="1.0"?>
<!DOCTYPE cross-domain-policy SYSTEM "http://www.macromedia.com/xml/dtds/cross-domain-policy.dtd">
<cross-domain-policy>
<allow-access-from domain="*" secure="false" to-ports="4445" />
</cross-domain-policy>


** CLEAN SOCKET  connection lost removing socket IO::Socket::INET=GLOB(0x84ca090)
** CLEAN SOCKET  flash client connection lost
No flash clients connected

192.168.1.104   <= <msg data="GENERAL|contexto|1|" />
192.168.1.104   => { "btn": "0", "cmd": "key", "data": "lcfgME5Me2vwcjyGW", "slot": "" }

192.168.1.104   => { "btn": "0@GENERAL", "cmd": "version", "data": "2.21!!1", "slot": "" }

192.168.1.104   <= <msg data="1|auth|102|7ee91cb5d3cc01e6e858150b50de47bd" />
192.168.1.104   => { "btn": "0", "cmd": "incorrect", "data": "0", "slot": "" }

** CLEAN SOCKET  connection lost removing socket IO::Socket::INET=GLOB(0xa68543c)
** CLEAN SOCKET  flash client connection lost
No flash clients connected

192.168.1.104   <= <msg data="GENERAL|contexto|1|" />
192.168.1.104   => { "btn": "0", "cmd": "key", "data": "E5NqiQdHMOEbnCBLFD", "slot": "" }

192.168.1.104   => { "btn": "0@GENERAL", "cmd": "version", "data": "2.21!!1", "slot": "" }

192.168.1.104   <= <msg data="1|auth|102|eaf64aacb19a53dce9173091fa718b24" />
192.168.1.104   => { "btn": "0", "cmd": "incorrect", "data": "0", "slot": "" }

** CLEAN SOCKET  connection lost removing socket IO::Socket::INET=GLOB(0xa3f51a4)
** CLEAN SOCKET  flash client connection lost
No flash clients connected

192.168.1.104   <= <msg data="GENERAL|contexto|1|" />
192.168.1.104   => { "btn": "0", "cmd": "key", "data": "IBXsbkzggRGv96OgDOvKpkdP4RoEk7l", "slot": "" }

192.168.1.104   => { "btn": "0@GENERAL", "cmd": "version", "data": "2.21!!1", "slot": "" }

192.168.1.104   <= <msg data="1|auth|102|2cdb2205ef72b1560d55603bd5ac3d2f" />
192.168.1.104   => { "btn": "0", "cmd": "incorrect", "data": "0", "slot": "" }

Any help/hints greatly appreciated!