I installed mythubuntu. When i click on watch tv i get the following error

Mythtv is already using all available inputs for the channel you selected. If u want to watch an in progress recording, select one from the playback menu. If u want to watch live tv cancel one of the in-progress recording from the delete menu.

the other problem i have is the tv guide isn't being populated. If i go into the guide it shows me nothing at all.
I'm using schedules direct