A: 

to give an answer to my own question: nusoap has a problem with php5 ... there are some answers and some solutions on the net (not many), but they didn't work with me. I downgraded to php4 and it works fine ...

doro
A: 

I used NuSOAP version 1.7.3 with PHP5. In this NuSOAP 1.7.3, soapclient class renamed by nu_soapclient.

You can try this $client = new nusoap_client('http://localhost/mysql/helloworld2.php');

CMIIW

daris