Thanks, now it turns out to be more clear for my problem, my system does not have the Guide plus + installed.
The whole story is here, I bought a OEM AIW RADEON without the intallation CDs. When I download the newest MMC 8.5, it needs the valid MMC 8.1 installation CD when intalling the MMC8.5, I don't have that. So, if somebody could refer a link to the MMC 8.1 installation CD image file (iso, cue) it would be a really help for me, also i beleive some folks on this forum would benifit from it too. It is rediculous tha the ATI website ask 10$ +10$ shiping for that!