think the map data base is setup were you have to log-in main page to use it
log-in forum and again on the main page
go ahead and use the same log-in information you use in the forum to log-in on the main page and try again to upload a map to the site
main page:
www.novahq.net
map data base is (i think) separated from the forum data base (servers)
both use the same member names and password to log-in with. give it another try