Damn.
I had three partitions C:, D:, E:. I tried to merge D and E partitions and PM froze while merging the partitions.
Then I reset the computer and got into Windows. When I open Partition Magic it says :
Your system appears to have lost power during a partition operation. The partition was marked with recoverable partition indicator, so your system cannot acces it and cause corruption. The partition and all of its data can be safely recovered. Would you like to recover the partition now ?
When I press yes, PM starts recovering the partition and (according to Windows Task Manager) freezes !
Is there anything to do with this, I had lot of important stuff on that partition .... ?