fix oauth/api issue

Hi there, I am looking for a php dev to help fix an issue with some code in our software to do with oauth and the linkedin API. We seem to be getting the following error that I can't work out how to fix. This could be a very quick job to someone familiar with oauth. Please only bid if you have experience with oauth and using APIs Fatal error: Uncaught exception 'OAuthException' with message 'Invalid auth/bad request (got a 401, expected HTTP/1.1 20X or a redirect)' in /home/XXXXX/public_html/linkedin/[login to view URL] Stack trace: #0 /home/XXXXX/public_html/linkedin/[login to view URL](66): OAuth->getAccessToken('https://api.lin...') #1 /home/XXXXX/public_html/[login to view URL](216): LinkedIn_Request->__construct() #2 /home/XXXXX/public_html/[login to view URL](835): DisplayJob('4680087') #3 {main} thrown in /home/XXXXX/public_html/linkedin/[login to view URL] on line 66