You had the Powertank on the Rim that day when we popped your tire bead back on with my tank? Hmmmmm, now you owe me two beers!
Do you know the vintage of your regulator? I know that Powertank's first series of regulators was problematical as mine was replaced by them, gratis, with a newer iteration after I wrote them about a problem I was having with the first series regulator. Still, if the tank valve was completely shut, the regulator shouldn't be an issue.