If the computer recognizes the camera when the USB cable is connected,
you can try the DATA REPAIR option in the camera menu (see manual page 41).
After that, you can try the repair database option in the Olympus ib program.
When this does not help, re-install the ib program (it is on the internal memory
of the camera, if you did not format or delete it earlier). If you made a backup,
of the cameras internal memory, re-install the ib program from that backup.
An alternative is to install another free and better
Olympus Viewer program.