File path too long and Cannot Access Message

Hi ,

I'm using VS2010 ,Exchange 2003 and IIS 6.

I'm facing some problems when I try to retrieve messages Using the WEBDAV technology.

The error I'm getting is the below

The specified path, file name, or both are too long. The fully qualified file name must be less than 260 characters, and the directory name must be less than 248 characters

and also in the IIS Log I have the below

2011-01-11 00:07:03 W3SVC100 10.70.3.20 PROPFIND /exchange/vahoma/Sent+Items - 80 - 10.70.6.5 Mozilla/4.0+(compatible;+Win32;+WinHttp.WinHttpRequest.5) 401 2 2148074254

any ideas how to overcome this problem ?.

I don't face this issue in all of my messages . One or two but this is a problem because I cannot find any pattern or solution and I want to make sure that I have read all the messages and not checking all the time if My program read the message or not.

Please help !