I recently restored our Production K2 4.5 databases onto our QA K2 4.5 database and then upgraded to 4.6.6. When I start the instance I get thousands of errors saying "64007 Provider did not return a result for <process user> on GetUser". <process user> is populated from our user database through a custom DLL which connects our application and K2. I double-checked connection strings and every other setting but I continue to get the errors. It seems as if K2 can't make a connection to our database to retrieve our user info. Any ideas?