I have installed FOP2 2.31.05 on Centos 6.8 64Bit but i have two problems with the parking.

1. the drag and drop park doesn't work. I have tried with both latest release of Firefox and Chrome. The drag and drop transfer instead works well. I have started fop2 with debug level 511 but on drop no events appear.
2. I have setup auto-answer on originate (_SIPADDHEADER51=Call-Info: answer-after=0) but on pick-up from Park doesn't work. It works well instead on pick-up from queues or on dialing extensions/external numbers.

Some suggestions?
Thank you,
Francesco