My remote won't accept low frequency channel numbers ie: 2,3,4,5,6,7, etc. When I finally do get it to show the number on the screen it appears in the color red, but doesn't change to that particuliar channel. I've changed the battery but, it still does the same thing. I've also tried putting the number 0 in front of the single digit number to no avail.. It changes to double digit channels fine.