Crystal Reports Suppression Criteria

Hi there,

I have what I thought was simple suppression criteria for my group but it's not returning the results I need, ;

if {?Days Over Due} = "All Pledges" then FALSE

//less than thirty days overdue but not negative or 0    *this returns negatives as well as values over 29
else if {?Days Over Due} = "Less than 30"
then ({@Days Overdue} <=0
and {@Days Overdue} >29)

//inclusive of 30 and 90 excluding less than 30 and greater than 90 *this returns similar results
else if {?Days Over Due} = "Between 30 and 90"
then ({@Days Overdue} <30
and {@Days Overdue} >90)

//inclusive of all over 90
else if {?Days Over Due} = "Greater than 90"
then {@Days Overdue} <=90

Any help would be appreciated!

Thank you - CS