Weapon trace problem

Hey,

I need some help with traces.

Here my c++ trace:

GetWorld()->LineTraceSingle(Hit, TraceFrom, TraceTo, ECC_Visibility, TraceParams);

but it doesn’t notice my Character BP.
If i set the collision Presets to BlockAllDynamic it works, but i think these are not the best settings for my character.

can anybody help me to set the right collision for my character BP to get noticed by the trace?