sending informations from TX-2 to arduino

I had small racing car with TX-2 and RX-2. I removed RX-2 and set arduino instead of it. Now i'm trying to recieve commands from TX-2 to arduino, wirelessly ofcourse ...

I tried setting antenna to digital pin on arduino, but i'm getting 1s and 0s almost randomly ( about 16 0s, and then 16 1s). Is there a way to read informations, since i want to control the whole car from distance. :)