ENAPILibrary API key not allowed

2013-11-27 01:23:03.261 mobiDev[3085:70b] ENAPIRequest: unexpected connectionShouldUseCredentialStorage 2013-11-27 01:23:03.513 mobiDev[3085:70b] errorMessage: Your API key is not allowed access to this method. Please contact biz@echonest.com with any questions.

just as before. and this is my request...is it correct?

[ENAPIRequest GETWithEndpoint:@"artist/audio" andParameters:[NSDictionary dictionaryWithObjectsAndKeys:artistCU, @"name",songCU, @"results",nil] andCompletionBlock:^(ENAPIRequest *request) { if (request.completedSuccessfully) { NSLog(@"response: %@", request.response); } else { NSLog(@"errorMessage: %@", request.errorMessage);}}];