Presuming you had the Indigo 6 installer install the driver for the 1132CU (it does by default, but you can uncheck the option), it should automatically find it and be able to connect to it. You might try re-running the Indigo 6 installer (and rebooting) to see if that gets it working.
If not, then open the Event Log window and copy/paste its contents into a forum reply after you attempt to enable the interface (and get the error), so we can see the details.