A problem with ranking on google only

This is a little complicated, I got a site which came out of the sandbox about a year ago, then the frontpage began to rank all over, but NON of the internal pages rank at all, they are spidered, but dont rank on google, but on MSN there is no problem. Thats the issue I have, I do have knowledge in SEO myself, so I need a expert, dont have to do anything just give a solution for this problem. Its a PR6 site. I got another build in somewhat same style, but that site rank good with internal pages, so is is possible to look at that site to compare. This is no big money case.