With about 135k blocks in the chain right now, it sounds like you're pretty far behind.  I'd suggest checking your debug logs to see if it can't connect to the IRC server where most of this is managed.  Other than that?  You may wish to wipe the entire bitcoin settings folder.

For reference, on Win 7, it should be: C:\Users\\AppData\Roaming\Bitcoin  You'll want to make sure you've got at least half a gig free of space, as the current chain/index on my machine is about 510Mb.