Final Ability ("Bladestorm"?) of Blademaster for selfmade Heroes?

[Rolemaster]

Hello there,

I created some new Heroes for my High Elven Race. One of them is a Blademaster quite similar to the Blademaster of the Orcs. But of course I switched the model to an other one. Now the "Bladestorm" (?) - in german "Klingensturm" - seems not to be working anymore. The Hero doesn't do anything - just stands there. The enemys don't seem to take damage. Then the icon dissappears for a few seconds.
Can you please help me?

Greetings, Rolemaster