I have R15 300 and am having trouble with it. My daughter gave me a R22 100 that they purchased a while back and are not using. Can I switch over to the R22 and would you recommend that I switch? I know I have to go thru Direct tv, I am just wondering if it is worth changing? The R15 300 is not doing what it is supposed to and we are very frustrated with it. Don't know if the R22 100 will be better. Help if you can.