Streak 7: No configuration screen :/

Hello Streaks users!

I have bought a Streak 7, two weeks ago. Last friday when I turned on appears the Dell's logo but it never starts. Continues in a loop over and over again. But the main problen is that when I tried to go the configuration screen, it doesn't appears.

Simultaneously press and hold the volume up button and volume down button and without releasing the volume buttons, press and hold the power button, and nothing happens... Only the home, menu and back buttons, gets illuminated.

After several times pressing the power button, I don't know how I managed to start the system in the "safe mode" but almost all the aplications and widgets don't function.

How can I reinstall Official Android 3.2 in my Dell Streak 7 if I can't go to the configuration screen?

Thanks a lot!

Alejandro