Access Denied when accessing Central Admin functions on SharePoint Server

Hi, this is a weird problem that is really bugging me out.  When I log into the Central Admin site from my local PC, I can access all of the features/modules/functions without any problems. 

I am trying to configure single sign-on and I received a message stating that the configuration can only be done from the server itself.

So I remote desktop into the server and go to the central admin site.  I login without any problems but then I get an Access Denied Error message when I click on the "Manage settings for single sign-on" from Operations.  I also find that I cannot access the services on the server.

I am using the Admin account I used to install SharePoint and have SharePoint running on a Win 2008 R2 server.

Any suggestions? 

Thanks!

Med