Is this thing just for me?
When i modify the channel ability to a ground target type (like shockwave) and try to use it, then i can't see the Targetthing/Mouse, it just disappears :/
Your Area of Effect is too small (probably 0). It's a campaign spell, and apparently its also an AoE spell.. I dont know much about Channel, but thats what I'm betting. If you made the AoE bigger, you would see your cursor.