trouble installing 6.1 on virtual PC 2004 - "Cannot parse information file"

[l Burnerheimerton]

I choose minial installation, NAT, uncheck Attach CD. 
I have the ISO on my desktop and throw it on the CD
picture of the virtual pc which is where I've 
read it to install to this point so I know that is
working.

It writes holographic and then I get this error
message:

"Cannot parse information file for the base
distribution: I/O error
Please verify that your media is valid and try again."

Any ideas or experience installing it on virtual PC
2004?  Thanks for any help.


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