Objective-C &JSONKit POST issue - objective-c

Question

I'm trying to post to a rails backend from Objective-C and JSONKit and am having difficulty getting my results published. I keep getting back a null recordset from my server.
[dictionary setValue:(#"bar") forKey:#"foo"];
NSString *JSON = [dictionary JSONString];
NSData *theData = [JSON dataUsingEncoding:NSUTF8StringEncoding];
NSURL *url = [NSURL URLWithString: myUrl];
NSString *postLength = [NSString stringWithFormat:#"%d", [theData length]];
NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
NSError *error = NULL;
NSURLResponse *response = nil;
[request setURL:url];
[request setHTTPMethod:#"POST"];
[request setValue:postLength forHTTPHeaderField:#"Content-Length"];
[request setValue:#"application/json-rpc" forHTTPHeaderField:#"Content-Type"];
[request setHTTPBody:theData];
NSData *result = [NSURLConnection sendSynchronousRequest:request
returningResponse:&response error:&error];
NSString *resultString = [[NSString alloc] initWithData:result encoding:NSUTF8StringEncoding];
NSLog(resultString);
Is there something I'm missing? the JSON seems to be serializing correctly
{"foo":"bar"}
Any help would be greatly appreciated.
Thanks!

Answer 1

Just changed the setValue from json-rpc to json and it worked like a champ.
[request setURL:url];
[request setHTTPMethod:#"POST"];
[request setValue:postLength forHTTPHeaderField:#"Content-Length"];
**[request setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];**
[request setCachePolicy:NSURLRequestReloadIgnoringCacheData];
[request setHTTPBody:theData];