Not sure what you mean by "on my name". When you upload a scenario you either are uploading a new scenario (one with a name that doesn't match any of your existing scenarios) or you are updating a scenario (the name matches an existing scenario). Those are the only two possibilities. If Greenfoot's asking for a description rather than a changelist, it means that the scenario doesn't exist (you changed the name perhaps) or otherwise it can't contact the greenfoot.org server.
"on my name" was not the best decription.
I mean that i didn't changed the name of the scenario and I have internet connection
Ok, just a glitch I guess. Maybe you did lose your internet connection briefly without noticing or something.