Slipstream fails - language or platform different?

[khill0]

Hello all:

I'm trying to Slipstream an XP Pro disk. The base disk is a SP1 desk and when I try to add SP2 to the package I get the follow message:

"Integrated install failed. The language type or platform for the destination directory and Service Pack 2 must be the same."

I'm confused since they are both English (US) and I have the correct platform.

Any ideas on what is causing this?

Thanks,

Ken