iPhone stuck in Recovery mode!!! HELP!!

I manually downloaded the ipsw file and was trying to restore my iphone using itunes (by holding shift and restore), An error occurred, so i thought of cancelling the restore process and by mistake i unplugged the cable from the usb port. Now it got stuck in the restore mode i.e itunes logo and the cable appeared in the screen. I tried restarting the iphone, plug again, reinstall itunes, restarted PC and all stuffs but IN VAIN!!! Itunes won't detect no more!! I've tried other third party applications too and SAME cannot detect the iphone. I was using v1.1.4 and was trying to update to v3.3.1. PLEASE HELP!!