Hey got a link 44s ecu in my car wrx 2001 it seems to be not reading the rpm signal?

Does anyone know the issue as the cluster doesn't read any and my sti cluster also. Also I know the cluster isn't broken as both rpm don't move and sti cluster sweeps on intro...

Cheers any help is good as I need it tuned any place I should check for loose cable? I even pluged in and out the cables and swap over to stock, but no luck as the stock ecu wouldn't fire up the car..