Remove WSUS then reinstall using these guides:
Install WSUS 3.0 on Windows Server 2008 R2
http://www.vkernel.ro/blog/install-wsus-3-0-on-windows-server-2008-r2
Configure WSUS to use SSL
http://www.vkernel.ro/blog/configure-wsus-to-use-ssl
Adrian Costea - MCP, MCTS, MCSA 2003, MCITP: Windows 7
My Blog: www.vkernel.ro/blog