Debugging With Non-Standard File Extensions

Using CFB 3.0.0 build 292922, connected to remote server running CF8 and IIS 6, I cannot get the debugger to work on ColdFusion files that have a non-standard extension.  Everything is working as expected on files with a .cfm or .cfc extension but not on any other files.

At first I could not even add breakpoints to those files and then I found the setting for Window>Preferences>ColdFusion>Debug Settings>Valid Extensions.  After adding my extension there I was able to add breakpoints to the file, but in trying to debug they are not firing.

With no other changes I can switch to FusionDebug and everything does work.

What am I missing to make this work using the ColdFusion debugger?