CallerID source lookup not even requesting

Hello everyone,

strange problem here:

Asterisk 1.8
CentOS 6

trying to set a callerID lookup source through HTTP.
Created lookup and set in inbound route, found that the lookup does not even take place: local php script is requested, but I noticed that it gets not called.
Does someone know how to debug this and try to find why it does not lookup lookups?

Best regards