sounds like you flashed it with a ybox or evox bios. If thats the case, the bios trys to load yboxdash or evoxdash depending on what bios was used.
Your HD doesn't have those files, so therefore reports an error. Burn evox to a cd-rw and get evox loaded, copy over from ftp the default.xbe file on the cd-rw and rename it yboxdash.xbe
And if you dare ask for help like this again without giving more info or reading tutorials the
GENERATION MATRIX
will be the least of your problems.