does anybody know what todo i tried a few things but can't get it right!? 

global class TestCallOut2 {
     webservice static MSAddressDirect2.getAddress1_response getAddress1(String username, string password, string profileid, string postalcode, string housenumber, string countrycode) {
        MSAddressDirect2.AddressDirectServer2ServicePort stub = new MSAddressDirect2.AddressDirectServer2ServicePort();
        MSAddressDirect2.getAddress1_response adresje = stub.getAddress1(username, password, profileid, postalcode, housenumber, countrycode);
        return adresje;
    }
}

Apexclass (generated via WSDL):

//Generated by wsdl2apex

public class MSAddressDirect2 {
    public class getAddress1_element {
        public String username;
        public String password;
        public String profileid;
        public String postal_code;
        public String house_number;
        public String country_code;
        private String[] username_type_info = new String[]{'username','http://www.w3.org/2001/XMLSchema','string','1','1','false'};
        private String[] password_type_info = new String[]{'password','http://www.w3.org/2001/XMLSchema','string','1','1','false'};
        private String[] profileid_type_info = new String[]{'profileid','http://www.w3.org/2001/XMLSchema','string','1','1','false'};
        private String[] postal_code_type_info = new String[]{'postal_code','http://www.w3.org/2001/XMLSchema','string','1','1','false'};
        private String[] house_number_type_info = new String[]{'house_number','http://www.w3.org/2001/XMLSchema','string','1','1','false'};
        private String[] country_code_type_info = new String[]{'country_code','http://www.w3.org/2001/XMLSchema','string','1','1','false'};
        private String[] apex_schema_type_info = new String[]{'http://soapserver.jsm.marktselect.com','true','false'};
        private String[] field_order_type_info = new String[]{'username','password','profileid','postal_code','house_number','country_code'};
    }
    public class AddressDirectServer2ServicePort {
        public String endpoint_x = 'http://xxx.xx.xx.xx/cgi-bin/jsmdirect?MSAddressDirect2';
        public Map<String,String> inputHttpHeaders_x;
        public Map<String,String> outputHttpHeaders_x;
        public String clientCert_x;
        public String clientCertPasswd_x;
        public Integer timeout_x;
        private String[] ns_map_type_info = new String[]{'http://soapserver.jsm.marktselect.com', 'MSAddressDirect2'};
        public MSAddressDirect2.GetAddress1_response getAddress1(String username,String password,String profileid,String postal_code,String house_number,String country_code) {
            MSAddressDirect2.getAddress1_element request_x = new MSAddressDirect2.getAddress1_element();
            MSAddressDirect2.getAddress1Response_element response_x;
            request_x.username = username;
            request_x.password = password;
            request_x.profileid = profileid;
            request_x.postal_code = postal_code;
            request_x.house_number = house_number;
            request_x.country_code = country_code;
            Map<String, MSAddressDirect2.getAddress1Response_element> response_map_x = new Map<String, MSAddressDirect2.getAddress1Response_element>();
            response_map_x.put('response_x', response_x);
            WebServiceCallout.invoke(
              this,
              request_x,
              response_map_x,
              new String[]{endpoint_x,
              'getAddress1',
              'http://soapserver.jsm.marktselect.com',
              'getAddress1',
              'http://soapserver.jsm.marktselect.com',
              'getAddress1Response',
              'MSAddressDirect2.getAddress1Response_element'}
            );
            response_x = response_map_x.get('response_x');
            return response_x.getAddress1Return;
        }
    }
    public class GetAddress1_response {
        public String address_city;
        public String address_house_number;
        public String address_postalcode;
        public String address_street;
        public String resultCode;
        public String resultMessage;
        private String[] address_city_type_info = new String[]{'address_city','http://www.w3.org/2001/XMLSchema','string','1','1','true'};
        private String[] address_house_number_type_info = new String[]{'address_house_number','http://www.w3.org/2001/XMLSchema','string','1','1','true'};
        private String[] address_postalcode_type_info = new String[]{'address_postalcode','http://www.w3.org/2001/XMLSchema','string','1','1','true'};
        private String[] address_street_type_info = new String[]{'address_street','http://www.w3.org/2001/XMLSchema','string','1','1','true'};
        private String[] resultCode_type_info = new String[]{'resultCode','http://www.w3.org/2001/XMLSchema','string','1','1','true'};
        private String[] resultMessage_type_info = new String[]{'resultMessage','http://www.w3.org/2001/XMLSchema','string','1','1','true'};
        private String[] apex_schema_type_info = new String[]{'http://soapserver.jsm.marktselect.com','true','false'};
        private String[] field_order_type_info = new String[]{'address_city','address_house_number','address_postalcode','address_street','resultCode','resultMessage'};
    }
    public class getAddress1Response_element {
        public MSAddressDirect2.GetAddress1_response getAddress1Return;
        private String[] getAddress1Return_type_info = new String[]{'getAddress1Return','http://soapserver.jsm.marktselect.com','GetAddress1_response','1','1','false'};
        private String[] apex_schema_type_info = new String[]{'http://soapserver.jsm.marktselect.com','true','false'};
        private String[] field_order_type_info = new String[]{'getAddress1Return'};
    }
}