PDMWorks Advanced Server upgrade 2006 to 2007

After upgrading from 2006 to 2007, we are receiving theerror:
"The PDMWorks Workgroup Viewer has an Invalid license registration.Please have your systems administrator check the PDMWorksinstallation."

The Vault Admin states that the license type is Normal.

When I try to change/re-enter the license, I also get an error thatthe license is invalid.

I have tried to re-install the Workgroup Viewer and licensing, butit has not helped.

Please help.

ThanksSolidworksWorkgroup Pdm