Problem with PB10

Hi,

I have a BDC program to create applicants through Tcode PB10. Previously this program was used to upload applicants for US alone & now i want to use it to upload data for Canada also.

When i try to use this program, for the first iteration it displays the the PB10 US screen (Screen no 110) and from the second iteration it starts giving the PB10 Canada screen (Screen no 0107). This happens irrespective of the country to which i want to upload the data.

Can you please let me know how the PB10 Tcode works for different countries and where is this customization maintained in SAP.

Any pointers will be appreciated.

Thanks in advance.