Bootstrapping Issues

[ErinRigh]

I am having a problem with bootstrapping.

I have created a Class Special called "True Lifer"

It grants immunity to pain, energy drain, ability drain and constitution damage

So I have bootstrapped the appropriate abilities (xImmPain, xImmEnerDr, xImmAbilDr, and xImmConDm (which I created), and added ClSpecWhen/20 as a tag to each and assigned the ability to my archetype at 20th level.

However, it shows up when I add any levels (even 1) of Magus(Lifer).

So, what did I do wrong, or forget?

Thanks in advance

Erin Righ