Monitor Trunks AGI

I have created a agi script to use with the Monitor Trunks feature in the trunk configuration. I have confirmed that the script works when triggered manually. The question I have is what format do I use to add the script when enabling the trunk monitor for the trunk I created. Do I need to specify an absolute path in the box /var/lib/asterisk/agi-bin/trunkfail.agi or do I just put trunkfail.agi, or just trunkfail? What am I missing? Please help.

Thank You - Dave