Error updating Exchange via web dav from vb

I am trying to run some VB.net code to update our public contacts folder. I can manually update the contact folder from Outlook or OWA without any problems. However, when I use the same username/password from VB.net to try to update a contact I get an "Access Denied" error. However, I can view the contacts without any problems.

Any suggestions would be greatly appreciated.

thanks,

Luis

[433 byte] By [llebron] at [2007-12-28]