[Zope] How does one access a ZClass property from a ZClass method?

I have a ZClass with a property sheet that contains two properties. I then created a method for the ZClass that tried to access the properties. For example: I created a property sheet that contained a float property named "high". I then created a DTML memo in the methods section of the ZClass. But when I put something like <dtml-var high> in the method, I get a KeyError saying that high doesn't exist? Obviously, I'm not understanding something somewhere. What am I doing wrong? ---------- Michael Grinder grinder@cs.montana.edu "Well, I've wrestled with reality for 35 years, doctor, and I'm happy to state I finally won out over it." -- Elwood P. Dowd in "Harvey"