How I can to call web service with out parameters?

Does anyone know how I can call WS with parameters of type OUT - I have a WS to which I need to pass parameters of type OUT, but does not allow me, gives me a message : SOAP Request: Method ‘SMSSenderWSSoapClient.SendSMS’ not found.

Although when I try through the wizard it shows me the Out parameters and the Invoke also succeeds, but when I click OK and enter “properties” the parameter field is empty.

I entered all the parameters manually, but I don’t know how to set the Out parameters.

I know that the problem is definitely with the Out parameters, because other WS without an Out parameter work fine.

Thanks.