I use X2a for livegigs. I run the setlist and use wait for keypress as delay for start next song. Sometimes the song just stops and steps forward to the next song in the playslist and show the "start next song" window. The most amazing thing about it, is that it happens at midnight (00.00). It's quit anoying, if you understand what I mean, because I run backingtracks and it just stops.

My laptop got an I5 processor and runs on W8 and X2a producer 64-bit with a M-Audio C600 soundcard.

Anyone else who recognise the problem?

Are you sure you don’t have any other process set up to run at midnight. If it is reproducible and always occurs at midnight then I would suggest you report it to cakewalk, as I would consider that to be errant programming if there is no other explanation. 

This thread deals with a similar problem.

I would check your windows task scheduler (system tools) to see what's scheduled to run at midnight.