Hi:
at work, we had a couple of sites in Kentico 5.0, we recently upgraded them to Kentcio 6.0

The CMS Desk LOOKS ok from the service, but if you navigate to an actual page, click on "Form" tab, you get the following

[Error loading the FormControl '']
d:\inetpub\qa.shows.ctvdigital.net\kentico\Views\FormControls\Show\ShowDropDownList.ascx.cs(52): error CS0103: The name 'QueryTypeEnum' does not exist in the current context


And it is just not IN ONE single place...many places in our CMS Desk now have this problem. Is this an upgraded related issue? Can some guru from Kentico offer any insight into this? Any hot fixes we need to apply?

All help is greatly appreciated...