Hey everybody. here's the deal

i had an activated iphone with 1.0. i tried to upgrade to 1.2 so i returned it to jail and updadated but a few problems came up, so i restored. everything was alright but i couldnt know what software version it restored, to 1.0 or 1.2? anyways, i restored and tried to jailbreak and activate with 1.0 firmware but iphone lost connection and now it wont start up... please help.

somebody... please? kinda freaking out here.