Hi,
FOP2 is not a phone. The spy action launches chanspy originating a call to your phone (SIP/110) first. Your phone should ring, and when you pickup, you will be listening to the other party.
In the debug it shows that the origination to SIP/110 failed. Was your phone available/free at the time you initiated the spy action? If you are busy talking to someone, then it will fail unless you have call waiting enabled.
I cannot tell you the reason for that failure, you might see some more information in the asterisk full log. But FOP2 did its job, it sent the correct command to asterisk.
Best regards,