Is this a mal-formed http request from an iPad, which kills Node.js multipart parser

Question

The below code is used in an iPad app to send an HTTP request to a Node.js web server, which produces the following error, but works fine w/ a regular HTML+browser form.

The server is Node.js + formidable which has a multipart parser that only dies on this line of code with this error:

message: parser error, 0 of 29162 bytes parsed

stack: Error: parser error, 0 of 29162 bytes parsed at IncomingForm.write (/usr/local/lib/node/.npm/formidable/0.9.8/package/lib/formidable/incoming_form.js:120:17) at IncomingMessage. (/usr/local/lib/node/.npm/formidable/0.9.8/package/lib/formidable/incoming_form.js:73:12)

at IncomingMessage.emit (events:27:15)
at HTTPParser.onBody (http:100:23)
at Stream.ondata (http:763:22)
at IOWatcher.callback (net:494:29)
at node.js:768:9

This is the iPad code:

NSMutableURLRequest * theRequest   = [[NSMutableURLRequest alloc] initWithURL:url];

[theRequest setTimeoutInterval:60];

[theRequest setHTTPMethod:@"POST"];

NSString *boundary = [NSString stringWithString:@"---------------------------14737809831466499882746641449"];
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];

[theRequest addValue:contentType forHTTPHeaderField: @"Content-Type"];

NSMutableData *body = [NSMutableData data];


//media 

[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];    
[body appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"image\"; filename=\"iosaudio.cai\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"Content-Type: image/jpeg\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithData:theAudio]];
[body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];

// setting the body of the post to the reqeust
[theRequest setHTTPBody:body];

Is the request being sent malformed? If so, why and how should it be done?