Okay, this may not be the same problem you are having, but I know when I first downloaded my bitcoin client it took days to sync. Even now it takes hours if I do not keep it running for a few days. Basically I am suggesting that it may just be a matter of time. If you are sitting at the same point forever in the amount of blocks it needs to download then you may have a serious issue, but if progress is just slow going it might not be that big of an issue.