Problems with inbound calls

I've got a TDM400 card configured with a one FXO module (and 3 FXS modules). I have one trunk set up, a ring group (600) which rings all extensions and an inbound route pointing to the ring group.

Outbound calls works fine, but when I attempt an inbound call trixbox answers and plays the goodbye message. I get the following from asterisk console:

Verbosity was 3 and is now 5
== Starting post polarity CID detection on channel 1
-- Starting simple switch on 'Zap/1-1'
-- Detected ring pattern: 0,0,0
-- Distinctive Ring matched context
== Starting Zap/1-1 at ,s,1 failed so falling back to exten 's'
== Starting Zap/1-1 at ,s,1 still failed so falling back to context 'default'
-- Executing [s@default:1] Playback("Zap/1-1", "vm-goodbye") in new stack
-- Playing 'vm-goodbye' (language 'en')
-- Executing [s@default:2] Macro("Zap/1-1", "hangupcall") in new stack
-- Executing [s@macro-hangupcall:1] ResetCDR("Zap/1-1", "w") in new stack
-- Executing [s@macro-hangupcall:2] NoCDR("Zap/1-1", "") in new stack
-- Executing [s@macro-hangupcall:3] GotoIf("Zap/1-1", "1?skiprg") in new stack
-- Goto (macro-hangupcall,s,6)
-- Executing [s@macro-hangupcall:6] GotoIf("Zap/1-1", "1?skipblkvm") in new stack
-- Goto (macro-hangupcall,s,9)
-- Executing [s@macro-hangupcall:9] GotoIf("Zap/1-1", "1?theend") in new stack
-- Goto (macro-hangupcall,s,11)
-- Executing [s@macro-hangupcall:11] Hangup("Zap/1-1", "") in new stack
== Spawn extension (macro-hangupcall, s, 11) exited non-zero on 'Zap/1-1' in macro 'hangupcall'
== Spawn extension (macro-hangupcall, s, 11) exited non-zero on 'Zap/1-1'
-- Hungup 'Zap/1-1'

I'm not sure what I am missing here, but something is clearly not right. I don't have much experience in modidfying the extension.conf files so any advice would be greatly appreciated!

nicolail