I have installed gpSP, of the latest version from the wiki, set up gpSP in the menu, but I'm unable to run any roms. I put the bios in /local/home/.gpSP/, but when I run any rom gpSP will start, show a black screen for about a second, then send me back to the menu. I have checked the md5sum of the bios to the listed one online. Am I missing something or did I not install it right?