dude...a new JB from Ziphone for the touch developed yesterday. Restore to 1.1.4 with iTunes. Then download new break from www.ziphone.org and Break in two mins or less.
Is it a new acquired phone?
Probably a hardware problem if you have reinstalled many times and did not help, it could be the case. Had few month ago a similar problem with another phone and finished by selling it?
Strange, I got a new 16 GB iPhone with 1.1.4 installed yesterday and got it jailbroken easy with the new ziPhone jailbreak. It's working great right now. You should try and get another one.