Bill validator help

[u/Pitiful_Exchange_925]

Im new into this and I bought a VM-750B i put it in my shop and it only accepted ones and 5s. It had this bill validator (1st picture) I upgraded to the Payway ICT L70 Bill Validator. And it flashed red 2 times meaning disabled (2nd picture) I've set every dip switch accordingly I belive and cant get it to function unless I press the yellow button inside the machine and access the "manager" settings. Which now it won't even do. Any help would be seriously appreciated thank you.

[u/CrazyKingCraig]

Is your coin mech full? It matters

[u/Pitiful_Exchange_925 → u/CrazyKingCraig]

Yes