Server did not recognize the value of HTTP Header SOAPAction in iPhone?

Question

Hi, I am try to connect webservices to my code i got error as "Server did not recognize the value of HTTP Header SOAPAction"

NSString *soapMessage = [NSString stringWithFormat: @"\n" "\n" "\n" "\n" "%@\n" "\n" "\n" "\n", @"new" ]; NSLog(soapMessage);

NSURL *url = [NSURL URLWithString:@"http://viium.com/WebService/HelloWorld.asmx"];
NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];
NSString *msgLength = [NSString stringWithFormat:@"%d", [soapMessage length]];

[theRequest addValue: @"text/xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];
[theRequest addValue: @"http://viium.com/Hello" forHTTPHeaderField:@"SOAPAction"];
[theRequest addValue: msgLength forHTTPHeaderField:@"Content-Length"];
[theRequest setHTTPMethod:@"POST"];
[theRequest setHTTPBody: [soapMessage dataUsingEncoding:NSUTF8StringEncoding]];

Please guide me what iam missing?