C# (VS2012) Facebook offline posting app

Hi, I am currently developing a Windows service to automatically post to my Business Facebook page. However I am having trouble figuring out how to do it - I can post to my personal page fine, but when I try and post to my Business page I get errors (even though my personal account is also a manager of my Business page), namely the following error: [login to view URL]: (OAuthException - #102) A user access token is required to request this resource. I need an experienced Facebook developer to help troubleshoot my C# (VS2012) code with me. I am currently using the NuGet facebook package. Regards, Gerald McNicholl