Have you used this master/buddy combination before?
If not, is the servo reversing correct and all trims matching?

You may also want to ask in the Hitec manufacturer support forum:
http://www.rcuniverse.com/forum/forumid_53/tt.htm

Be sure to list exactly which models of master and buddy you are using as well as the receiver model. Even the buddy cord type may be important. And state whether the combination worked before or not.