Do you receive the following errors upon opening DIMA?

"The expression On Load you entered as the event property setting produced the following error: Module not found."

"The expression On Activate you entered as the event property setting produced the following error:  Module not found."

"The expression On Current you entered as the event property setting produced the following error: Module not found."

If you are using Access 2007, you need to update to a newer version of Access.  Otherwise, the problem is a blank Site/Plot.  Import your data into a new database and delete the blank Site/Plot.