GeraldKo-- I'm afraid I don't know what I did that made it work. Check the spacing of the entry in the about:config textbox, I think I may have had to do something with that. If you cut and pasted it from someplace, it's worth double checking.
Sorry I can't be of more help; it wasn't working and then it did.

EDIT: I am using the iPhone user agent, not the iPod Touch one. Maybe that is the difference?