They moved me to a new server that didn't support Silverlight so my apps stopped working properly. The solution can be found on Api Junkie's blog on his post: Fix for "Could not download the Silverlight application".

At first I was scheptical but I had nothing to lose so I submitted Mashooo.com as a sample of a Silverlight Application to the Silverlight.net Showcase. To my surprise it was up there in no time, Thanks to the silverlight.net team for considering us.