Do you mean the start up IOS? It should be IOS 58 v 6175, if it isn't then download it from Modmii and go from there.
If your asking about installing wads, press left to switch ios, choose (250 if your 250 is like mine: D2X v9 base 57) and you can instal wads from usb no problem, any other non 57 based IOS gives issues.
Hope this helps?
Sound like you did something you shouldn't have, simply download that ios 58 I mentioned, use an exploit to boot to a wad manager of your choice, and reinstall clean 58, then exit, use exploit again to load HBC, then try MMM again,.
Also in the root of your USB/SD card there should be a mmmconfig.txt, try change the AutoLoadIOS=249 to 250 or something other than 52??
Last edited by DEFAULTDNB; 07-04-2012 at 08:52 AM.