debian 3.1r3 netinstall cd couldn't be mounted

[deva seetharam <tagsense@yahoo.com>]

hello all,
i have a system with a gigabyte mobo (ga-965sp-s3) with intel Pentium-D 925 processor. i am trying to install debian stable (3.1 r3) using the netinstall cd. although the cd is read and i get the "press F1 for help or ENTER for boot:" message, the CDROM mounting step fails with the message "CDROM couldn't be mounted". 
i tried the expert option and tried the steps given below. 


could anyone pls. help?

some relevant details
================
1. the cd-rom drive is a ide dvd-writer. 
2. the hard drive uses SATA. 

 

many thanks in advance,
deva
"expert"
 before the "detect & mount cdrom" step I started a shell
    (<ctrl><alt><F2>)
 and gave these commands
    modprobe ide-core options="ide=nodma"
    modprobe piix
    modprobe ide-detect
 Back in the main installer screen. I selected the
    detect & mount cddrom
 option. This took me to a long list of
 modules that autodetection
 suggested were necessary.
    I turned off all but these: ide-disk, ide-cd, isofs
  when prompted to enter parameters for these modules,
    I said "Y" but did not enter any parameters.
    The modules loaded with no errors.

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