Digital Workshop

I have a database linked to opus. In a query I have four fields linked to variables. Problem is when you look at the query again two of the four fields now have the variable greyed out. Also when searching, the % sign does not work.
Any thoughts.
Paul

Its ok folks got got it sorted. Just added 2 new fields in access and deleted the ones cuasing the prob. Had the query set to 'equals to' instead of 'like' the % now works in the search.
Paul