ADO Exception Error:Object reference not set to an instance of an object.

I get the VB.NET exception: **Object reference not set to an instance of an object.** I am trying to do this: you click on a grid, row select, and it populates a list(with a couple of colums) based on the row selector in a checkedlistbox. I believe the object is Null because it doesn't like my variable Cur_Agent in my "Select *...Where USerID=Cur_Agent" command. It's treating Cur_agent as an object that has been disposed of I think. If I hard code a value for the UserID instead of referring to Cur_Agent, it worked fine. Although I can't get it to work now.?? I would like it to be able to accept the Cur_Agent value and filter with that. ## Deliverables 1) complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform Windows/XP