Hi, Im using a comcast cable box supplied by comcast. motorola. In all my rooms the on demand selections tend to fail the first 3 times and in my room channels 2-11 pretty much never come in, always says (channel will be availble shortly) in my room i am using a little cable extender to reach the cord from my wall to my cable box. Is this my problem? I feel like i had trouble with those channels before i used the extender? Will one straight shot cable fix it? Any input is greatly appreciated.