Which records does it show then? Like records apply to the last filter setting or ...?Still not working. I step through the code and it goes to Case 10 and steps through but the form is not filtering to show all records.....
What records does it show when you open the form direct from the Navigation window?
I would create a "temporary/test" form with a button and have the code for clearing the filter on the "[Open Opportunities List] form behind it, where you can play with the code until it clears the filter correct.
Is it possible for you to make a stripped version of you database with some sample code and post the database?