$nx = 2; 
$ny = 4; 
$SqlStatement = "execute sp_test $nx, $ny"; 

if ( $dbLang->Sql($SqlStatement) ) { 
     print( "\n----\nSQL Error: " . $dbLang->Error()); 
     print( "SQL statement = \'$SqlStatement\'\n----");
     <>;
     exit; 
}