Are you having any problems with other programs?
If so your Windows install might be corrupt and could probably use a reload or your RAM is shoddy and would need to be replaced but first,
Try:
1. Delete your Graal folder.
2. Create new Graal folder.
3. Place Graal.exe in the folder.
V6 Graal.exe:
http://forums.graalonline.com/forums...66&postcount=1