So, how did u resolve the problem?

Yes. This problem only occurs when I playback a recorded MIDI track. Playing stuff on Cakewalk is prefectly fine. I also have the Voyetra MIDI Orchestrator. I tried the same thing on it. When i played back the track, it seems that all the notes I inputed were all placed on the start, and played simultaneously(so it just lasted about 1 second). So u still think it's the MIDI cable that's the problem?
Remember, the MIDI cable I use is brand new. Though that could probably mean absolutely nothing.

Do u have the problem of a MIDI track not changing the current patch despite the patch name already displayed in the Pane view? Like, regardless of what patch u selected in the Pane view, the track still uses the default piano sound to play the track?

ALso, I would like to know if there r other XP30 users(including u) out there who noticed any misaligned keys in their XP30's. It seems that on ALL octaves, the gaps between F&G, and A&B seems a little bit too wide, while the ones between G&A r too close(the gap is kinda wedge-shaped, with the keys pulling inwards). This happens in every octave. The synth plays fine, thought at times the G and A keys scrub against each other. I want to know if this is a factory defect, or normal for all XP30's. I'm also wondering if the other XP's have this "deformity".

Thanks.