UCR200 Remote Problems

Initially, I assumed I would need to disconnect the UC100 USB controller, but Dan Immohr corrected me to say that BOTH must be installed. After a week of trying, have NEVER been able to get this handheld remote to work (with EITHER UCCNC or Mach3, both registered recent versions) One consistent error comes up w/ Mach3, "wrong version of UCR200.dll", so how am I to know how/where to find the correct version? With UCCNC, always seems to be looking for Mach3 (LED readout says can't find a version of Mach3) and none of the buttons cause anything to move. Everything was working well (with Kress spindle replacing my original HF500 Spindle), but now NOTHING works. Oh, yeah, Blue and Green LED's all show correctly when UCCNC (or Mach3) is fired up. Sure would appreciate some guidance. Thanks.