Is the background of your texture white, if so change the colour to red, if the lines appear red on your render your UV co-ords are slightly out. you can change the resolution that appears in the UV mapping window to the same size as your texture map, this allow for a much more accurate placement.
In the UV window Options>Preferences
and change the dimensions of the render preferences to the same size as you texture map.
I give ip with thos baner fing as it never seems to work for me. I woll now stop wasting mu time.