Parameters and Formulas in a group field

I have a formula in my group footer that I need to pass to a paramter. The formula doesn't come up in my select expert box? When I try to manually add it, it gives me this error
"This formula cannot be used because it must be evaluated later"

my formula is a account balance formula and I have a parameter that I want to choose where the balance is greater than ".01"

How can I get this accomplished?So you want to use the result of the group footer formula in the record selection formula?
What is your formula? You might be able to use the group selection formula instead.
e.g. if you're grouping on account and summing a value field your group selection formula could be something like
sum({value}, {account}) > 0
which will only return accounts whose 'balance' is > 0