RDO wrote To try to narrow down what may be causing the problem, I started removing code, section by section and re-trying the redirect. I got it all the way down to Imports System Imports DotNetNuke Namespace YourCompany.Modules.PGT     Partial Class ViewPGT         Inherits Entities.Modules.PortalModuleBase         Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click             Response.Redirect("http://www.microsoft.com")         End Sub     End Class End Namespace Still the same thing. If logged in as Host or Admin, it works, for any other user, it only refreshes the page....

If you are using an ImageButton, I think you'll have to change your eventargs to:  ByVal e As System.Web.UI.ImageClickEventArgs

I don't know how that would be different according to what user you are logged in as, though.  Can you redirect to an 'internal' page when logged in as a regular user or are you just having problems redirecting to an 'external' site?  Also, when you click the button are you sure it's doing a refresh or is it just not taking you to the new site?

I don't recall the exact formula to the limit but I do know that the length of the role name plays a factor because user roles are stored in the cookie. It would be simply too demanding on the database to query every role for every module in real time.

Longer role names=lower maximum role count

Again, the only way is to test it is with real values.

I hope this is of some help to you.