Jenee, have you tried to replace the receiver in the FunCub leaving all other things in the plane? Have you got the same result? If not, there might really be someting wrong with the receiver. Send it to the MULTIPLEX-Service, in general they are fast, competent and reliable!
I have about at least 25 M-Link-receivers in use from different sources (for brandnew to second-hand), from "light" to "pro" and I have never had one that could not be made working. But as you might know: ony where people don't work they don't make mistakes!