FCB1010 MIDI NOTES PROBLEM

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I have a serious problem when i try to use the fcb1010 to send midinotes. I've configured it exactly as the manual says and double checked with other forum posts which said the same. But when i press the configured key, instead of sending the note one time it starts sending it a billion times per second and does not stop until the device is turned off. Any idea what could be causing this or how to fix it? thanks in advance.