Main Menu Background image problem

I was looking into creating skins for FM13 so i first downloaded a skin and used this as a guide, but every time i create a main menu background, its cutting half the picture off in the game, ive set the image to the same image size as the one in the skin i have all ready got yet even when i lower the image size its still cutting the image off, been at it for 2 hours now and its annoying the hell out of me! thanks in advance.