Bryan, try this as it worked for me when I had the same problem. If you are looking at the Lake Sumter camera you will get that message so try the Spanish Springs camera. The link is a little different so I will include it here.
http://www.thevillages.com/lifestyle/cam_ss.asp . Now when you click on the SS camera you may get an message bar at the top of the window with the active-x message. Click on the message bar to load the active-x control and that should do it.
For some reason the message bar would not come up on the Lake Sumter cam for me the last time I had to install the active-x control. I had to add the program when either I put me new Vista 64 machine on line or I upgraded to IE8 but once installed it works great.