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To access the extended voices, you must specify more than just the voice number. You have to specify the instrument definition, bank number, LSB and MSB for the voice you want. Every keyboard spells out these parameters in its own way, so you will have to find out how the 3000 does it. This info is in the manual, probably kin a table in the back.

The specifyin' is done in the computer program, not on the keyboard. So there is a bit of a learning curve here, but it is not really difficult. More like 'tedious.' You will prob. have to experiment many times before you get a result you like. It is worth the effort.

As a next step, tell us what sequencing software you are using on the computer.