GLDuke 3D and JDoom/Doomsday under Win 7 Ultimate 64bit

i don’t get GLDuke 3D (error message that no duke.grp was found - but the duke.grp is in the right folder) to run and Doomsday has no sound under Win 7 64bit. i’ve set them to compatibility mode already but this doesn’t help.

maybe someone knows how to get them to run proberly under 7 64bit and could help me?

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.