The problem has nothing to do with the network, I already knew that. For now it seems pretty random, that's why I need more feedback. I'll take a look at it tomorrow, I only have weekends to work on this.
Also, if your antivirus detects it as malware, it's probably because of the SlimDX.dll that it is included in the app. It is necessary for the movie mode to work. Totally safe, the dll is open source.