Conditional Formatting, Date Ranges and Rows

Hello,
I have scoured the newsgroups and searched quite a few posts for what I
would like to do. We will use cell R3 as an example. I have Office 2007 and I
would like to do the following:

Highlight the row green if the date in R3 is less than 30 days old.
Highlight the row yellow if the date in R3 is more than 30 but less than 60
days
Highlight the row red if the date in R3 is more than 60 days old

I have tried a variety of methods, but I cannot get any one to work.

Please help!

thanks so much.

M