On this machine the smallest seq file I have is 54 meg, and it's a while back (old) maybe last saved in RB2011, been saved as another name quite a few times, but it's also the oldest seq file. I just checked it and it worked fine here. You wanna try a 54 meg download? I could probably erase a few tracks to shrink it a little .. and you'll likely not have the plugins I used, so the tracks would sound way off from how they do here .. but I'd post it for testing. Long as the filesize isn't an issue.