Analogue-sequencer

> if i'm right, is there a way to rewire the power jack instead 
> of getting a
> new supply? i'd really rather not buy more parts at this point...

Sounds like you just have the polarity wrong.
Did you use a 3 pin header for the power input, or wire it directly to
the board ?
If it's on a header, just try swapping the pins round.

BTW normal wiring is centre negative...

Cheers,
Colin f