SAP Crystal Report - Repeating Page

Hi I am sorry iam a new to crystal report  can anyone help me on this.

i have a layout with 2 subreport

Details: some text

Detail a -- Subreport  (Adhoc here)

Detail b -- Subreport  (Other Charges)

i just wondering why when i run my report i got a two pages  with same contents except the report header. because on the second page there is no report header.

Please help me

Regards

Silent