80 views and no reply?
1.Perhaps some standard paths/assigns are missing?
2.Maybe the associated tool can't be read as a tool, ie it has faulty bits set or perhaps actually are project-files instead of .exe/tools?
3.Could be they aren't located where they should be?
Hard to tell without having the problem in front of me :p
Try running DOS-Trace and see what happens when the WB tries to open them.