Note that there is also a file size limit of 12 kb, so even if you re-size your old one, it won't upload if the file size is too large.
Its been noted here that newbies sometimes get a rough treatment. Here is one response, written by Old Dog, that might help those thinking of making their first post understand a little bit about this place. After you read this take a moment (or two or three) and look around and get a sense of this place. If you're still interested make your intro and join the fray. —Jed