ok.... first did you make sure itunes is lower than 7.6?
also... STOP USING 1.1.3!!!!!!!!!!!!!!!!!!!!!
i have said this in a couple other posts and its nothing against you, but people need to understand 1.1.3 is still in its beta stages of it all! i am doing some work with it and i have had to rejailbreak and upgrade my ipod touch about 5 times to work with 1.1.3!
http://theidoctor.blogspot.com/2008/...i-touches.html
this tutorial will help with jailbreaking and everything, but 1.1.3 doesn't have that much more to offer than what the third party apps can i would wait until the all clear to install 1.1.3 is available from installer!
as i am typing this, my ipod touch can not download or uninstall any third party apps an so i will be doing another jailbreak and some development stuff, but if you are going to upgrade to 1.1.3 as of february 3 2008.... expect bugs and freezes and pre release problems with your touch!