import opportunity from excel

i have a requirement to import opportunity from excel using x++ job . i have customer account number and name field also when i am trying to create new party its giving the last name in all entry and other fields are working fine . i think issue in this line

               DirParty = DirParty::constructFromCommon(smmOpportunityTable, DirUtility::getCurrentDateTime(),DirPartyType::Organization);
                DirParty.parmName(conPeek(readcon,3));

plz suggest me thanks in advance...