problem with FLT Yoke

Hi to all:I was wondering if anyone can help me with this issue.I have a CH flightsim yoke from CH product, it is a PC game port not a USB. Since yesterday, I don't know what I did, but my throttle only react to full or low nothing in between regardles wher it is.What I mean by that, is as soom as I move it a bit, it goes to full power, and it does not decrease, andI have to bring it all the way to the back to cut it. I tried to reinstall the drivers, I tried to look throught with FSUIPC registerd one, still no go, I calibrated many time still no luck.Any Ideas what should I do?Thanks in advanceWalouigi