FOSS gamedev and creative worlds

I want to upload a map called "Eternal Night" with the omploader and i zipped it in a winrar zip archive and now it shows the error that it can't add or update. Do anyone know what this means (sorry for my bad english i'm from germany) ???

ompldr isn't always stable, you could use something like Dropbox or MediaFire instead.

I suggest Dropbox

Thanks guys. I hope you will like the map.