Iphone 3g firmware 4.2.1 got freezed after jailbreak attempt

[randhirek]

I jailbreak using redsnow it went successful after that I copied ultrasnow manually, after that reboot phone got stuck and am nt able to restore it using iTunes or anything.
Pls some one help … pls tell me how to recover from this..

Thanks …..

 

[bab2010]

You get stucked where? Black screen? Black screen with white apple logo? Device load up not activate?

 

[randhirek]

now phone is showing itunes screen, its not booting up..
also whn i try to restore it gets restarted aftr some time.. so totally stuck wit it ... any way restore ?