What's the deal with supposed tempo-synced effects?

The Cakewalk Tempo-Delay doesn't detect or follow project tempo as best I can determine.
Playing with TAL Delay it seems to detect tempo but not tempo-changes. 

I'm looking for a dual delay that syncs to tempo. What's the trick?

I have nver had an issue with synchin to tempo...maybe some one else can chime in...just never noticed this being an issue..

Have you tried the Sonitus delay?

Yeah...Sonitus is the one I have used...I never have used the Cakewalk VST's...so I might have spoke out of ignorance...

Have you tried setting "register as tempo based effect" in the plugin properties in the plugin manager?

Ohhh...good catch Sharke...that is an easy one to miss...