Stored Procedure not excecuted successfully

Question

hy all
i got the exception while calling the my stored procedure.from java code....can any one help me to what the issue is occurs ...for this exception...
my procedure is executes successfully in sql server 2005 database.....but while calling from the java code it gives me following exception...
//java code...
con=DriverManager.getConnection(url+dbName, user, psw);
          // CallableStatement cstmt = con.prepareCall("{call dbo.GetCapchaData(?, ?)}");
          CallableStatement cs = con.prepareCall("{? = call GetCapchaData(?)}");
          cs.registerOutParameter(1,java.sql.Types.VARCHAR );
          cs.setString(2, firstname);
System.out.println("VLAUES OF THE CALLEBALE QUERY");
          cs.execute();
          String retValue = cs.getString(1);
..get the following exception.....
com.microsoft.sqlserver.jdbc.SQLServerException: Procedure or function 'GetCapchaData' expects parameter '@code1', which was not supplied.
     at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDatabaseError(Unknown Source)
     at com.microsoft.sqlserver.jdbc.IOBuffer.processPackets(Unknown Source)
     at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.getPrepExecResponse(Unknown Source)
     at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.doExecutePreparedStatement(Unknown Source)
     at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement$PreparedStatementExecutionRequest.executeStatement(Unknown Source)
     at com.microsoft.sqlserver.jdbc.CancelableRequest.execute(Unknown Source)
//this my stored procedure code..
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[GetCapchaData]
     @FirstName VARCHAR(50) ,
@code1 VARCHAR(50) OUTPUT
AS
BEGIN
     SET NOCOUNT ON;
SELECT @code1 = code
FROM dbo.EmployeeDetail
WHERE fname = @FirstName
END

Answer 1

Hy all
i find the solution.....using following code....
con=DriverManager.getConnection(url+dbName, user, psw);
// CallableStatement cs = con.prepareCall("{? = call GetCapchaData(?)}");
          CallableStatement cs = con.prepareCall("{call dbo.GetCapchaData(?,?)}");//use this code instead of above.....line
          cs.setString(1, firstname);
          cs.registerOutParameter(2,java.sql.Types.VARCHAR );
          cs.execute();
          String retValue = cs.getString(2);
if someone get this type of error they can use it.......
Thanks
Yatin Baraiya