Sorry – we can no longer support these units as they are too old (introduced 1987) and no-one here knows anything about them (many of our staff were not born in 1987)..

In more general terms, my guess would be that the problem is either your MIDI controller, or the MIDI circuitry in the 3000. Loading multiple programs in a row is often a sign of a baud rate issue, which means a hardware problem somewhere.

Since units are often sold second-hand because they have a problem, you could discuss it with your vendor.