my iphone was working perfectly fine. however i bought a new computer and recently downloaded iTunes. today i connected my iphone to my computer to get all the latest updates,etc. everything was working fine and then it seemed as though my computer froze. so i disconnected my iphone and it still appeared to be connected when it wasn't. so i turn off my computer and turn it on again, and when i connect my iphone it asks me to restore it. with all the pain in the world(sad of loosing all my music, photos, contacts, etc) i click restore. everything is going fine but when it is finished restoring it, it says there is an error, and know my iphone won't turn on, it just asks me to connect it to itunes and when i do nothing happens!

please help!!!!!!!!!!!!!!!