MS CRM passing parameters in the query string

By default MS CRM 4 doesn't accept passing parameters in the query string, and it gives CRM error message
To enable passing parameters
follow the instructions in this URL
http://blogs.msdn.com/b/rextang/archive/2008/09/24/8962549.aspx

by adding a DWORD registry key under MSCRM named DisableParameterFilter and setting the value to 1

MS CRM Changing business unit for a user gives an error

We were trying to change the business unit for a user and it was giving us CRM error.

We already have increased the timeout long time ago by adding the registry keys as instructed here http://support.microsoft.com/kb/918609

Still having the same error.

Lastly we tried cleaning up the Async table as instructed here http://support.microsoft.com/kb/968520

After doing this we were able to change the business unit for the users