When I try to upload, I have the error message "KEY:VALIDATION_FAIL".
I have tried uploading stats with your key, looks like working. You could try one more thing, just type key by hand (its case sensitive so make sure everything is in caps).
Here with uploaded my empty save. http://smbstats.muffinz.eu/Akbalder
bummer :( Can't u make one with a normal register like most sites have? would be nice
Thats the problem with steam for you? You don't have it? If no, you could register for new steam account and use it. System does not check accounts for owned games. So even empty account can be used.