My iPhone's stuck on Apple logo screen

[y0ungSir]

I updated my iPhone and jailbroke it to 3.01. Everything was okay except the iPod app kept crashing, and iTunes didn't recognize my iPhone anymore. So I decided to reset all settings and erase everything. It took two and a half hours, but when I tried to turn it on, it didn't work; it got stuck on the Apple loading screen with the little loading sign. What should I do?

EDIT: Also, I selected the erase everything from my iPhone because iTunes wouldn't recognize it.

[blkcadi]

Dang dude, more problems huh, that sux.
Unfortunately you'll have to put in DFU mode and restore again.

[y0ungSir]

^ Yes, more problems, lol. I thought I had problems with my old windows mobile phone, lol. I put it in dfu mode, and everything's working fine now.

[blkcadi]

Next time don't use the reset all settings, it screws it up when your are jailbroken as you found out.