fetching folder ot user info via oauth

$tokens	= array('oauth_token'=>$_GET['oauth_token'],'oauth_verifier'=> $_GET['oauth_verifier'],'oauth_token_secret'=>$tokenSecret);
$ymc = new YMClient($key,$secret);
$accessToken= $ymc->oauth_get_access_token($tokens);
$params = new stdclass();  // Empty params attribute
$params->fid = 'Inbox';
$params->startInfo = 0;
$params->numInfo = 10;
$results = $ymc->ListMessages($params,$accessToken);
var_dump($results); //the output is null :(

function __call($method, $arguments) {
		$this->oaRefreshedToken = null;

		list ($params, $tok) = $arguments;

		ob_start();
		echo "\nthis is method: $method";
		echo "\nthis is arguments: ";print_r($arguments);
		echo "\nthis is params: ";var_dump($params);
		echo "\nthis is tok: ";print_r($tok);		
		$string = ob_get_contents();
		ob_clean();
		oauthEmail::writeToLogFile($string);
		
		
		if(!$tok) {
			throw new YMClientException("Missing oauth access token", 0, null);
		}	
		
		$request = new stdclass();
		$request->method = $method;
		$request->params = $params;

		// Create a loop around the cascade request in case
		// the access token needs to be refreshed.
		for($attemptNo = 0; $attemptNo < 2; $attemptNo++) {
			$ch = curl_init(JSON11_ENDPOINT_URL);
			curl_setopt($ch, CURLOPT_POST, 1);
			curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($request));
			curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
			curl_setopt($ch, CURLOPT_HTTPHEADER, array(
				'Content-Type: application/json',
				'Accept: application/json',
				$this->__build_oauth_header($tok)
			));
			$rawresponse = curl_exec($ch);
			$responseCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
			$responseContentType = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
			curl_close($ch);

			if($responseContentType === "application/json") {
				if($rawresponse == "") {
					throw new YMClientException("Empty response", 0, "The Ymail webservice returned an empty response");
				}

				$response = json_decode($rawresponse);

				// Cascade returned an "unauthorized" response. Try to refresh the access token
				if($responseCode == 401) {
	
					// The token expired, attempt to refresh it
					if(isset($response->error->description) && preg_match("/token_expired/", $response->error->description)) {
						$tok = $this->__oauth_refresh_access_token($tok);
						$this->oaRefreshedToken = $tok;
					}

					// Some other error occured. Forward along info about it.
					else {
						throw new YMClientException("Ymail request failed", $responseCode, $response);
					}
				}

				else {
					return $response->result;
				}
			}

			else {
				// Cascade returned a malformed response. Forward along info about it.
				throw new YMClientException("Ymail request failed", $responseCode, "Bad response from Ymail: HTTP $responseCode, Content-Type: $responseContentType");
			}
		}
	}