"Unrecognized database format 'C:\MediaLab\temp.mdb'

Every time I try to run an single experiment in Media Lab I get this error. It pops up just after I choose an experiment to run. Also once I hit the OK button, (only option to choose) MediaLab completely shuts down. I have tried running various experiments and it happens every time. It just started happening today. It was working fine even earlier today but just started, and not sure why, I don't feel like I changed anything or hit a wrong button or anything. I only have one computer with MediaLab on it and need the program to be working on Monday (17th) for subject participants who will be coming in. Is there an easy fix with this problem?