Groups in Crystal Reports

[lipika123]

We have (3) groups as follows:
1) Parent Code
2) Default payee
3) Application No

Default payee group is a formula

if isnull({FUNDING.DEFAULT_PAYEE_CODE}) OR ({FUNDING.DEFAULT_PAYEE_CODE})="" then
trim({APPLICATION.VENDORCODE})
else
trim({FUNDING.DEFAULT_PAYEE_CODE})

when parent name of parent code group equal to Default payee name of Default payee Name, then only i need a page break, in these situation, all the default payee application should appear together

In some situation parent group has some default payee which should appear on separate sheet

Any body know please help