How to get more than 1 HD stream - DirecTV

I just got my ATT uverse installed and I can only record 1 HD program at a time. I can't watch any HD programs if I'm recording one. I went to system info and I have 3 SD/1 HD. How do I upgrade?

This question, "How to get more than 1 HD stream," is about DirecTV channels, programming, equipment, and sports.