I received the below error when trying to upgrade from 3.0.1 to 3.2.2.  I replaced the keys in the release config file and then renamed it to web.config.  I triple checked the keys to assure that they were correct.  Below is the error.  I have a ssl module installed and I'm wondering if it caused the error.

[NullReferenceException: Object reference not set to an instance of an
object.]
   tt.SSL_Module.SSL_ModuleRT.ProcessSSL(HttpApplication& app) +106
   tt.SSL_Module.HTTPHandler_SSL.OnBeginRequest(Object s, EventArgs e)
+385

System.Web.SyncEventExecutionStep.System.Web.HttpApplication+IExecutionS
tep.Execute() +59
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean&
completedSynchronously) +87

The above error is what I see when accessing the website once the 3.2.2 code is uploaded.  I also triple checked by web.config before accessing the site.