I can't attack anything - with a specific toon

[Viscere]

Hello guys,

I have an issue with a specific toon of mine...

When logging over to my other characters, I can attack properly any mobs...

When I switch back to my monk however, I cannot. I relog, switch toons again, get back on the monk and well I can't...

It gives me a weird error when I try to duel a PC also, it tells me "must target a PC"...

any idea how to fix?

thanks!