Audio out of sync

[Von_Dingle]

I am running Pro Tools 8 M-Powered and I have a Session that has:

MIDI Drum track
1 audio bass track
and 5 audio guitar tracks

the last 2 guitar tracks don't start until 1:02 on the timeline and I could see the colored box along the edit window with my audio clearly visible. However, at 1:06 I don't hear it at all anymore, not until 2:12 do I actually hear it and it is running way past the colored track boxes that shows the audio for each track.. it just runs past and plays the audio late.
Does anyone know what the problem is?

Thanks!