Which processor are you targeting?
Which extension do you use for the assembly include files?
Which version are you using (5.9 is the ide version, not the product version).
In order to get target specific coloring, make sure you add the assembly include files to the project and to
map the extension to the right coloring setup.
Especially extensions like *.asm, *.s, *,inc, *.h, *.c are colored in a generic fashion unless the file is part of a project, in which case the project settings do usually cause it to be colored target dependent.
Daniel