Help With The IF Function

Hi all,

I am looking for a little bit of help with a problem I am having. I am developing worksheet for the purpose of calculating Short Rate earned premiums. I have the majority of what I need figured out but I am haveing some trouble with the IF function. What I am trying for is something like:

IF(C4=D4,70,0)

But for some reason the fuction won't work for me with "=", i can get it to work with ">=" or "<=" but if I use "=" it continues to come up false even when its true. Any insight would certainly be appreciated. Thanks.