ORIGINAL: mrcoolpop

I am putting a plane together and here is the problem I'm having. I have 2 S3010 servo with a spectrum ar600 receiver. I have a two 24 extention for each one and a Y connector going to the reciever. I only have one servo that works. I can switch them around but only the right side will work. What can this possible be? Do I need to go into the setting and change something.