UnitSizeFactor

[nur]

"Sorry we don't support UnitSizeFactor of !=1 yet"

I m getting such an error message during boot.
I have kernel 2.2.20. 8MB DoC Millennium Module
32 MB Ram. I have enabled Doc Millennium Only from Kernel and let kernel
find window address of it. And mtd char device nftl support.
DoC512.exb is installed. What should I do ?
Is it safe to install doc42.exb which I think will solve the problem?
Thanks