Doom3 Mod problems creating new Particles

[linuxfree1]

Hi everybody.

I,m trying create a particle sparks with new color using the material textures/particles/spark3 and when i save file .prt in my folder particles inside base i create a fx file but cant get texture spark3 only a black squares the rest working fine.The error are in material? whats folder i need for particle work correctly?

thanks