how can i call stored procedure from ms sql? below is my stored procedure:

CREATE procedure dbo.sp_updateStorageSystem
@type varchar(20),
@model varchar(20),
@serialnumber varchar(20),
@codeversion varchar(20),
@disks varchar(10),
@IPAddress varchar(15),
@setupID varchar(4)

as
Begin
     declare @exists int
     set @exists = 0
     if exists (Select 1 From storageSystem Where serialnumber=@serial
+number)    
     begin
               set @exists = 1
     update storageSystem
     set type=@type, model=@model, codeversion=@codeversion, disks=@di
+sks
     where serialnumber=@serialnumber
               return @exists
     end
     else
     begin
     insert into storageSystem (type, model, serialnumber, codeversion
+, disks, IPAddress) 
                         values (@type, @model, @serialnumber, @codeve
+rsion, @disks,@IPAddress)
    end
End
GO

here's my perl code:

eval {
$sql = q{ BEGIN
              :rv := sp_updateStorageSystem(parameter1_in => ?,
                             parameter2_in => ?
                                     );
          END; 
        }; 
$sth = $dbh->prepare( $sql );
};
if ($@) {
     warn "prepare stored procedure failed. \n";
}


for($count=0; $count < scalar(@IP); $count++) 
{
     for($sCount=0; $sCount < $s_count; $sCount++) {
          eval {
               
               $sth->bind_param(1, $ssID[$sCount], SQL_VARCHAR);
                   $sth->bind_param(2, $IP[$count], SQL_VARCHAR);
                   $sth->execute();
                   #$dbh->commit();
            };
            if( $@ ) {
                   warn "Database error: $@\n";
                   #$dbh->rollback(); #just die if rollback is failing
            }
     }
}
[download]

this the error i get: Database error: Can't call method "bind_param" on an undefined value thanks for help!

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