I use Tattoodle as my homepage on Firefox, I cannot get Foxfire to save the design I want for my homepage, I do know the proceedure for changing the HP, but on start up Firefox goes back to the wrong design.

I have used Tattoodle for several years as my homepage on Firefox, but with the new Firefox 4, the homepage design keeps returning to a default design instead of the one i have chosen. I have used the normal Tools procedure for changing the Homepage and when I restart Firefox, it returns to the default design. I did not have this problem with previous Firefox editions. Please what am i forgetting to do?