you should still have the zXXXXXXX file if it didn't submit it. the client gives up trying to submit a block sometimes if it times out too much. it's so that that it can continue work even if a block is denied but i suppose the client should differentiate between not being to open a connection and not being able to work with the server.
email it to me and i'll put it in the db for you.
-Louie