can't open downloaded appz
 

i have downloaded a couple of appz which will not open!either with the launch in limewire or dragging the sit file onto the stuffit icon it will do nada! i am finding it most annoying as i spent a day downloading one of them. yes i have tried it with ither downloaded files and it works, and there is more than one file that the problem occurs with so i am presuming it isn't the file.
can anybody help me???

I'm having this problem, too.
there must be someone out there, that knows how to fix this, PLEASE?!?

could be the App file is a native OS X and not OS 9, some will work in both OSs but not all.

Phil