Restore using iTunes. Hold shift down (or command on a mac) whilst clicking the restore button in iTunes with your phone connected. This will open a browse window. Select the 1.1.4 firmware (which can be obtained from the downloads section here on MMI) and iTunes will proceed to restore your phone to an OTB state. It removes the Jail Break and unlock.
Then instead of using ziphone look into the iliberty+ or winpwn methods of JB and unlocking. Much safer. A guide is provided in each relevant section here in the forums
Hope this helps
