wsdl2objc - unrecognized selector sent to instance

[jpipearagon]

my problem is the customer implemetacion webservice with wsdl2objc

CobraMovilServicePortBinding * binding = [[CobraMovilService ;
binding.logXMLInOut = YES;
binding.authUsername = @ "rociopena";
binding.authPassword = @ "12345678";

CobraMovilService_getUsuarioMovil * cUserName = [[CobraMovilService_getUsuarioMovil alloc] init];
cusername.username = @ "rociopena";


[binding getUsuarioMovilAsyncUsingParameters: cUserName delegate: self];

the error is this:

PWebservice [314: F803] - [CobraMovilServicePortBinding_getUsuarioMovil setDelegate:]: unrecognized selector Sent to instance 0x6976210

Excuse me for my English do not speak very well