asterisk users - Mar 2006 - Callerid error: receiving DNID instead of callerID

Hi,
I installed asterisk 1.2.1 on a debian distro with 2 tdm400p cards.
I'm receiving the DNID instead of callerid...this is very strange.
I found many errors and warnings inside asterisk log like these:


Feb 28 15:28:12 ERROR[18218] callerid.c: fsk_serie made mylen < 0 (-14)
Feb 28 15:28:12 WARNING[18218] chan_zap.c: CallerID feed failed: Success
Feb 28 15:28:12 WARNING[18218] chan_zap.c: CallerID returned with error on
channel 'Zap/1-1'


What is the exact meaning of those error and warnings?
Is there anybody who can help me understand this problem, please?

TIA

Giorgio Incantalupo