Unknown server tag 'CustomTag_1:FilteredLookupFieldControl'.

Mar 12, 2012 at 11:45 AM

Hi

i had my administrator install this in the server, but when i try to add it in a page layout, i get the  error message

Unknown server tag 'CustomTag_1:FilteredLookupFieldControl'.

I am new to sharepoint, it must be something with registering the control but how can i fix it?

Thanks