cfgridsortcolumn

I'm really new to CFCs and CF8 in general, and I am trying to create a grid that reads from a query result set called from another file (both a CFC and a .cfm file). When I use the CFC in IE I get an error saying an exception was thrown and not caught, and no employees show up, but the query definitely returned the right info, because it shows up fine if I look at the cfdebug window. When I use the CFC in Firefox with Firebug I get no JS errors, but also no employees show up. If I look at the logs, it looks like cfgridsortcolumn is undefined in the CFC. It's default value is NULL, so how can it possible be undefined? Is there something else going on here? When I use the URL it works fine. When I move these files to a different folder in a different branch, both URL and CFC work fine.

Any ideas? Thanks!