1845c back up alarm issues...

Okay so bought an 1845c and needed to have a backup alarm bought the two pressure switches and adapters put the both on the right side of the tandem pump wired keyed hot power through one switch and to the other as it should be. How ever with the key just turned to on I have no backup alarm which is normal. However as soon as I start it my alarm stays on while not moving. If I move full forward it goes off but in neutral machine not creeping and me not having to keep it from creeping it still goes off. Could there be pressure on the reverse side enough to set them off even while the machine is sitting still? Or am I missing something.

Thanks in advance here are some pics to show wireing

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1845c back up alarm issues...