Did you not say in your OP that everything worked fine in Sandbox but not when you run Dark RP.. maybe you either have a bad version of Dark RP or there is something in it that conflicts with the accesses in ULX.
Unfortunately I don't think if that is the case, there is anything that can be done on this side to help you.. Maybe get in contact with the maker(s) of Dark RP and see if they know of any conflicts with ULX.