PortID for Project Quotation Report!!!

Dear Experts - I need to execute PortID in my Project quotation. I added Port field in the lines tab from SalesQuotationLine table and I wants to retrieve this Port field based on ItemID. For that I wrote below code but this code retrieving one port value to all ItemIDs...

 m_tPSAQuotationsTmp.Port = IntrastatPort::find(SalesQuotationLine::find(salesQuotationTable.QuotationId).Port).Description;

Thanks

Faqru Shaik