Powerstrip Help!

I am using a Toshiba 30" Wide screen TV and a DVI to HDMI cable. I have been working with Powerstrip for a few hours, and am very frustrated. First, I got an image after some tweaking, and changed to again. After this change I have gotten no picture at all. I have tried every basic setting, and have reinstalled, to try to get a picture back but have had no luck. I don't even think my TV is getting a signal, because the HDMI signal indicator text on my screen doesn't go away. Can anyone help me? Thank you for your time.