How can i make windows mobile phone sync?

I originally uploaded windows mobile 6.1, to my blackjack 2 and about a year later my phone started acting up. i decided to reload it, but my phone shut off during the middle of the upload! now my phone wont move past the "samsung" screen, thus activesync wont recognize my phone to download the software. how can i fix this? PLEASE HELP!|||U are going to have to reset the firmware. Look online for the button sequence to accomplish this.