[Asterisk-Users] FXS problems

[bails]

Hi all I've got a digium Wildcard TDM400P REV E/F Board 1,

I seem to be having some problems with the FXS modules on i, for example 
when i dial

90044117XXXXXX

tail -f /var/log/asterisk/full gives me

Nov  7 13:01:01 VERBOSE[2516]:     -- Starting simple switch on 'Zap/1-1'
Nov  7 13:01:05 DEBUG[2516]: DTMF digit: 9 on Zap/1-1
Nov  7 13:01:07 DEBUG[2516]: DTMF digit: 0 on Zap/1-1
Nov  7 13:01:07 DEBUG[2516]: DTMF digit: 0 on Zap/1-1
Nov  7 13:01:08 DEBUG[2516]: DTMF digit: 6 on Zap/1-1
Nov  7 13:01:12 DEBUG[2516]: DTMF digit: 0 on Zap/1-1
Nov  7 13:01:12 DEBUG[2516]: DTMF digit: 0 on Zap/1-1
Nov  7 13:01:12 DEBUG[2516]: DTMF digit: 0 on Zap/1-1
Nov  7 13:01:13 DEBUG[2516]: DTMF digit: 0 on Zap/1-1
Nov  7 13:01:13 DEBUG[2516]: DTMF digit: 0 on Zap/1-1
Nov  7 13:01:13 DEBUG[2516]: DTMF digit: 0 on Zap/1-1
Nov  7 13:01:14 DEBUG[2516]: DTMF digit: 0 on Zap/1-1

Which indicates to me that the FXS module is not getting all the 
signalling, as numbers are missing

I have added relaxdtmf=yes to my zapata.conf but this seems not to help 
atall.

Could this be a hardware failure?

Thanks in advance

Bails