I just recently hooked up my M2 at my home. It works great on my home network and works remotely via cellular connection and from my work wifi. I just had Internet set up at my lake house and it gives me an error every time I try to access my slingbox. When I launch the sling player app from iPad and iPhone, it finds my slingbox but when I try to connect it gives me an error and asks if both devices are connected to the Internet. I believe my ISP may be blocking the slingbox. How can I test this.