have you got a copy of slayers auto installer 2.5? you may be able to fix it with this if you havent search for it on google and burn it very slow in nero burning as an image let me know how you get on with this
also what chip do you have? i think you may just have the common wrongly named msxboxdash.xbe it should be xboxdash.xbe? could you check you evox.ini file and check or perhaps paste it on for me cheers