function runs on scanner emulator, but not scanner itself (C#, SQL) -

i'm developing add-in scanner. i've run problems specific function i'm writing. problem seems connection string. code runs fine on scanner emulator, not on scanner itself. ideas going on?

i error error has occured while establishing connection server. when connecting sql server 2005, failure may caused fact... (provider: named pipes provider, error - 40 not open connection sql server)

the scanner uses active directory, think. may problem.

the code follows:

    private bool confirmname(string clientid)     {          string clientname = "";          try         {             // setting sqlconnectionstringbuilder             sqlconnectionstringbuilder buildit = new sqlconnectionstringbuilder();             buildit.datasource = "xxx.xx.x.xx";             buildit.initialcatalog = "test_clinical";             buildit.integratedsecurity = true;              sqlconnection con = new sqlconnection(buildit.connectionstring);             con.open();             using (sqlcommand command = new sqlcommand("select first_name, last_name background patient_no=@patient_no", con))             {                 command.parameters.addwithvalue("@patient_no", clientid);                 sqldatareader reader = command.executereader();                 if (reader.hasrows)                 {                     reader.read();                     clientname = reader.getstring(0).trim() + " " + reader.getstring(1).trim();                 } // end if (reader.hasrows)                 else                 {                     // no client found id.                     return false;                 } // end else             } // end using (sqlcommand command = new sqlcommand("select first_name, last_name background patient_no=@patient_no", con))         } // end try         catch (exception err)         {             //messagebox.show(err.message);             exporterhost.writesystemlog(logtype.error, "e9999999", "sql error: " + err.message);             return false;         }          // @ point, should have valid client name.          // creating dialog , giving appropriate text.         sampledialog checkit = new sampledialog();         checkit.setquestion("do want scan document " + clientname + "?");          if (checkit.showdialog() == dialogresult.ok)         {             return true;         } // end if (checkit.showdialog() == dialogresult.ok)         else         {             return false;         } // end else      } // end confirmname 

the system we're using developing handles sql connections on different port reason. problem.

still curious worked on emulator, not hardware though.