My tuncano 40 has a tower hobby receiver, 72/27 freq. it came with a cheap Tx. So I went the LHS yesterday and bought a 36 cystal for the Rx so that I could use my Better JR Tx. This morning before work I switched cyrstals, turned on my jr receiver, then the flipped the switch on the tuncano, got just a tad of servo jitter. tried the sticks, nothing!! I did not swtich models on the Tx. What am I doing wrong, this should work, or at least I think it should. Do I need to pair the Rx and Tx some way? The Tx I'm using is a JR XF421EX.

Thanks