Could not load type "System.Web.Security.AccessRoleProvider"

In order to install BackupExec v11, I needed to remove .NET Framework 2.0
BETA and install .NET Framework 2.0. When the BETA version was removed, all
apps reverted to 1.1. I have since run aspnet_regiis.exe -i to update the
app but since I get the error listed on the subject line.

This is what is returned:

Line 46:
Line 47:
Line 48: type="System.Web.Security.AccessRoleProvider"
connectionStringName="AccessFileName" applicationName="/">
Line 49:
Line 50:

This is a .NET app connected to a MS Access db also using the ASPNetdb.mdb
file.

Roland