Put request IOS

I try to update a object in the database trough a API call. I do this action with a PUT request. A Post request was already made and is working fine. I thought it is just copy paste...

The API part works fine because if I execute the following curl command than it updates the row I wanted in the database

$ curl -H 'Accept: application/json' -i -X PUT -d 'UserLogin=Ub0D&EndDate=2014-01-17 00:00:00.0000000&Sport=Fietsen&Distance=1000&Duration=10&Achieved=true&DateCreated=2015-05-09 12:01:00.000000' http://localhost:8089/api/goal/ub0d -k -u ub0d:test123

But now the part in swift gives me a bad request error (400)... This is my code

    var url : NSURL
    url = NSURL(string: _apiUrl + connectToApi(apiCall) + String("\(AccountRepository.Instance.getCurrentUserName())"))!

    let request = NSMutableURLRequest(URL: url)

    if postString != nil {

        let postData : NSData = ("UserLogin=Ub0D&EndDate=2014-01-1700:00:00.0000000&Sport=Fietsen&Distance=1000&Duration=10&Achieved=true&DateCreated=2014-01-1700:00:00.0000000").dataUsingEncoding(NSUTF8StringEncoding)!
        // create the request
        request.HTTPMethod = "PUT"
        request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "content-type")
        request.setValue("application/json", forHTTPHeaderField: "Content-type")
        request.setValue("application/json", forHTTPHeaderField: "Accept")
        request.HTTPBody = postData
    }
    var connection: NSURLConnection = NSURLConnection(request: request, delegate: self, startImmediately: true)!

I'm really stuck on it:(