Highlight Formula for Empty Date Fields Older Than 5 Days Today

I must be missing something in my logic that I don't see and need help.  I am writing a highlighting formula on a date field.  There are two dates involved.  

DateOne = in our system
DateTwo = left our system

The formula looks at DateTwo to see if there is a date there.  If there is no date there, and it has been in our system for more than 5 days it should highlight red on the empty field.

I can get it to work if I check for the date field being empty only.  However, if I check to see if the field is empty and it's been here for more than 5 days, nothing gets highlighted.

Here's my formula:



If isNull({DateTwo}) and ({DateOne} < DateAdd("d",-5, CurrentDate)) Then "X"

Can anyone see the logic I am missing?

Crystal Reports XI

Thanks

Joe