thanks for the input.
i have direct tv and cable internet.
yes i am using X10 Video Sender receiver setup.
kitchen laptop is the problem.
i have found a work around,the problem seems to be the wireless laptop in the kitchen, were the tv is.
anyhow although the problem is only slightly annoying i found by disabling the network connection on the laptop the problem goes away.So i have put the network connection (icon) on the desktop so i can disconnect and reconnect at will.
i will try the diffrent channels and get back here to let you know my findings,even though im quite happy with the work around.