You can't always believe what you read. I just finished on another thread debunking an article that made that claim.
If you can back this charge up with specific quotes, be my guest but I haven't seen such evidence yet.
I think that I read it in the WSJ. The article was about why the tapes and documents hadn't been released, and the argument that Negroponte was giving about protecting allies. The conclusion was that it might be our own CIA that was being protected from the embarassment of having been right about the WMDs.