Roborealm RF interface

Hi,

I am doing an object tracking bot and am controlling the bot using differential drive of 2 dc motors, getting the signal from the parallel port via the parallel port module… i want to make it rf controlled, i tried encoding the 4 data values thro ht12e and sending it thro a tx and after receiving it with rx and decoding the whole thing using ht12d and giving its output to a motor driver(l293d) to the motors… but it doesnt seem to work:(… any ideas what i should do? please help…i’ve so far tested both the encoder and decoder individually and the motor driver individually…they work fine…