Problem with MPC1000 Corrupting Files

What up, I been been reading these forums for almost a year for advice but I just registered since I have a problem and can't find an answer. Maybe yall could help me out. I bought the EXM128mb RAM a couple weeks ago. Everything was going fine until last week one of my files I had saved with 5 songs on it (it was an ALLSEQ file) wouldn't load. I had saved it and loaded it a bunch of times before with no issues, but this time I tried to load it and it said "end of file". I tried to copy the file on to my computer, but it wouldn't let me (the file was corrupted or something) so I just deleted it and remade those songs. I have made a couple of songs since then and none have bugged out on me like that, but I don't want it to happen again.

Another weird thing that happened with a song I had recorded way before I got the EXM (I did update it and save it with a new sample after I got the EXM tho) is that it will play the first 74 bars fine, but when it gets to 75.01.48 it stops playing the sounds until it ends @ bar 77.01.01. I go to step edit, and all the steps are still there, but they just won't play for those last 2 bars. The really weird thing is if I copy the whole song and paste it into a new sequence, it plays just fine, even the last 2 bars.

I never had any problems with my MPC until I got the EXM, so common sense tells me that's what it is altho I'm not sure. I did a Google search but I couldn't find any answers. If anyone could help me out I would appreciate it.

Has anyone ever experienced something like this? It happened to me again today. Tried to load an ALLSEQ file and it said "end of file" and wouldn't let me get to any of the songs. It's the same file from the first post, the one that wouldn't play the last 2 bars.