Help with iPhone Passcode.

I have and iPhone 3G and the first thing I want to say is that I do know the passcode I just can't enter it anywhere. The iphone says iPhone is Disabled Please Connect to iTunes. Well when I connect it, it tells me it can't connect because it is locked with a passcode. Then it tells me to enter the Passcode on the iPhone first. The problem is, it won't let me enter it on the iphone because it tells me to connect to itunes. I want to clarify that I do know the passcode and I don't want to restore it because I don't want to lose my data. I have search google and had no help, because all the results were for people who "forgot" their passcode and they had to restore. Do I have any option other than restore so I can enter the passcode? Thanks, all help is appreciated.

 

Ok thanks for the quick reply! I I'll try it with its original computer and I'll let you know if I have any problems. Thanks again.