Designer 8.0 add server problem , "C:/SoftwareAG/MWS/bin is not valid"

I am getting the following error when I try to add a new MWS Server in Designer.

“C:/SoftwareAG/MWS/bin is not valid”

It is the same as…
http://www.wmusers.com/forum/showthread.php?21910-WebMethods-8-2-Designer-Installation

But I cannot update to 8.2 , the Designer must be 8.0 . Is there any other known solution for this ?
Or is this a known bug ???

Help Needed !!

Hey,

Try to create the bin directory in your file system, this can solve the problem.

Best Regards

Ismael