Cannot open graaleditor.exe on vista

[atomuskus]

When I try to open the level editor I get an error that says:
Exception EAccess violation at address 0052747E in module 'GraalEditor.exe'. Read of address 0000002C.
After I press OK, it says:
Access violation at address 004F6B63 in module 'GraalEditor.exe'. Read of address 00000008.
I have tried running it in XP compatibility and I still get the same error.