J2ME HttpConnection getResponseCode() NullPointerException

String xmlContent = pXmlParameter;
HttpConnection connection = null;
OutputStream printout = null;
InputStream input = null;
try{
connection = (HttpConnection) Connector.open( "http://www.myownserver.com/xml.php", Connector.READ, true );
connection.setRequestMethod( HttpConnection.POST );
connection.setRequestProperty( "Content-Type", "text/xml" );
printout = connection.openOutputStream();
printout.write( xmlContent.getBytes() );
int respCode = connection.getResponseCode();// onkelma

onkelma kohdassa:
tapahtuu NullPointerException poikkeus kun ajetaan laitteessa esim. Nokia5220, mutta toimii hyvin emulaattorissa kun ajetaan NetBeans 6.9.1 IDE:llä

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