It doesn't give you a message that it's too big.
You can re-size it using any graphics program. If you don't have one there are a few free web based ones:http://www.resizr.com/
Just re-size the pic to width: 125 pixels it will automatically choose the height
Click re-size my pic button
Click view once it's processed and save the new pic
Upload at BTV and presto ur done