Hi,
What are the permissions you have in /etc/asterisk/manager.conf ? You will have to stop op_server.pl as a service and start it from the command line to capture the output nicely, and then you can try some transfers and inspect the output to look for problems, errors, etc...
service op_panel stop
cd /var/www/html/panel
script eraseme.log
./op_server.pl -X 15
....
do your tests
....
ctrl-C
exit
You will have the output captured in eraseme.log. Look for "redirect" (that is the command for performing transfers) and the responses to that.
Just to be clear again, these instructions apply to the original FOP, not for FOP2.