OPL black screen in MCslot1 but works fine in MCslot2?

[OmegaHurtz]

I have a FMCB MC with the lastest OPL on it, it works fine when put in MCslot2 but it doesnt load games when its in MCslot1 it just gives a black screen and i need it to work in slot1 so i can use MX4SIO in slot 2? any ideas whats going on?