As FurryNutz suggested, you first need to validate that you're entering the correct IP address by logging into the router UI and looking at the connected device table. I'm not 100% sure, but if the IP address is correct, I don't think ActiveX is required to see the DCS-932L web UI login page. Do you have another browser on the PC that you're using? Try Firefox.
I'm sure you already know this, but when the IP address is used to reference the camera, PC must be on the same LAN as the router. If you previously configured the camera to use a static IP address or changed the port (through the DCS-932L web UI), then the camera may not be accessible -- a factory reset will fix this particular scenario.