LinkedIn Rich Media Shares API error 'Not enough permissions to access media resource'

I have LinkedIn app (Created from here https://www.linkedin.com/developer/apps) with scope of r_basicprofile, r_emailaddress, rw_company_admin, w_share

After completing auth process successfully I got access token from LinkedIn API and it's working to get authenticated user information.

But while I try to use Rich Media Shares API then it's not working for me.I am getting following error:

{"serviceErrorCode":100,"message":"Not enough permissions to access media resource","status":403}

Here is the request code sample:

<?php$curl = curl_init();curl_setopt_array($curl, array( CURLOPT_URL => "https://api.linkedin.com/media/upload", CURLOPT_RETURNTRANSFER => true, CURLOPT_ENCODING => "", CURLOPT_MAXREDIRS => 10, CURLOPT_TIMEOUT => 30, CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1, CURLOPT_CUSTOMREQUEST => "POST",    CURLOPT_POSTFIELDS => "------    WebKitFormBoundary7MA4YWxkTrZu0gW\r\nContent-Disposition: form-    data; name=\"source\"; filename=\"iphone5.jpeg\"\r\nContent-Type:     image/jpeg\r\n[**image_binary_data**]\r\n\r\n------WebKitFormBoundary7MA4YWxkTrZu0gW--", CURLOPT_HTTPHEADER => array("authorization: Bearer [**accesstoken**]","cache-control: no-cache","content-type: multipart/form-data; boundary=----       WebKitFormBoundary7MA4YWxkTrZu0gW" ),));$response = curl_exec($curl);$err = curl_error($curl);curl_close($curl);if ($err) {  echo "cURL Error #:" . $err;} else {  echo $response;}