I am testing a VVX 250 on my Vonage business account. The Vonage provisioning includes an option for a custom logo, but there is a vertical white line as part of the default display that messes things up. I have swiped this photo (attached) from another post here about custom displays, because it shows the line I'm speaking of quite clearly. How can I get rid of that thin vertical line down the middle? TIA, Nathan