Bank of america keep the change help?

I just opened a checking and savings account with Bank of America. I also opted for Keep the Change--but haven't (pardon the pun) seen any "change" in my savings account. It's empty, but I've spent at least ten dollars and should have an amount like that in my account...I have no maintenance fee on the savings account because of the options I chose. However, it was only yesterday that I got said account, so perhaps it hasn't start yet. I'm not sure. Anything I should know? (I umed it was taken out purchase by purchase.)