MIDI track not syncing - HELP

[charlzm]

I have Pro Tools LE, an MBox 2, Windows XP, AMD Athlon 64 dual core 2.2 mhz and 2 gigs of RAM. I am using an ancient Ensoniq ESQ1 for a MIDI trigger device and am trying to lay down a MIDI track for drum samples from BFD Lite.

When I play along with the click or the four non-MIDI instrument tracks I have already laid down, I hear everything in real time. But when I play back the data I have just recorded, the drums are all off. It sounded like a quantize error, but I checked and all quantize functions are turned off.

I even tried doing a one bar loop at half speed to get the drums as close to the exact beats as I could, but when I play back, everything is shifted off the beats I played to.

I consulted the Pro Tools Reference Guide and can't find anything that explains why this is happening. My other friends with MBox powered-Pro Tools LE say they have never had anything like this happen.

I don't think this is a latency issue, as I have a fairly powerful computer.

At this point, I'm about to start step-programming the drum patterns unless anyone can offer any insight.