Scan Exckusions

Pardon me if this has been asked and answered.  I haved looked over the posts pretty thoroughly and could not find it addressed.

 

Noton Internet Security 2010:

 

When I try to exclude network drives or folders on network drives I receive an error message:  "you entered an invalid path exclusion".   This is done by browsing to the drive or the folder with the drop down navigation window.

 

For the life of me I cannot figure what is the problem.

 

Any and all help gratefully accepted!

 

Chaz