If by "glow" you mean the tiny little dripping poison particle... it does work, but it's
very subtle, and it's probably partially bugged in the Titanium client.
The camera has to be
very close to the weapon in order for the particle to appear. If the camera isn't basically close-up on your character, it won't appear. I made a quick clip demonstrating this (with the particle significantly exaggerated to make it easier to see)
here.
The distance issue seems to be related to how small the particle is -- it is significantly scaled down from the texture it is based on. Probably related to back-end changes to the particle system that were made sometime long after classic (some other epics also animate their particles incorrectly, although those ones are
fixable). No obvious way to fix this.