had a similar problem with my 865GBF mobo......i had upgraded its BIOS once from windows based installer, after that this strange prollem occured.....If i pute CD/DVDdrive and HDD on different IDE cables then CD/DVDdrive was not shown in boot order, tried changing all the options and jumper setting but no use, the only thing that solved the prollem for me was to put hard disk and CD/DVD drive on the same IDE cable