3.1 Jailbreak carrier logo disappeared?

[eoren1]

Tried this but failed...need some help

I had successfully upgraded my 3.0JB to 3.1JB but lost the carrier logo and saw this thread. Decided to upgrade to 3.1 official as I have no interest in unlock. Completed the 3.1 restore and then went into DFU mode to restore with the pwned 3.1FW. However, I am now getting error 1600 each time! Searched the threads here and tried the following:
Used each of the 2 usb ports on the macbook
Restarted computer
Deleted files in ~/Library/iTunes/Device Support
Repwned the 3.1 FW and tried again

Any suggestions???
Thanks!
E

 

[eoren1]

Success!
I had been entering DFU mode by using an analog clock and holding the home/power x 10 secs then home only x 10 secs.
Decided to use the Pwnage tool's DFU mode tutorial and it worked without an error 1600!
Maybe my clock is fast/slow???
Anyway, I'm now on 3.1JB and restoring from a backup.
E