Help me.... (File take very very very long time to open)

Dear anybody,

I'm using Corel Draw X3, and just few days ago some of my cdr files take very very long time to open.

File with 4MB size take time about 15-20 minutes to open, and after it's open the copy and paste is having the same problem.

But some other files are just fine.

Could any body help to solve my problem? What's wrong with my cdr files?



Aman S