Textures fail to load

[Wilco]

Hello,
Today I just installed Oxygen and Bulldozer correctly, but I have a problem when I am creating the crate on the tutorials available. When I right click after I have selected the face and went into texture mode the load texture screen pops up. Well I click the texture red_door.pac and hit open, well, it still says [null]. Anyone mind helping me?

[BraTTy]

Wow its been a while,fresh meat,lol
Welcome to O2

Chances are you are getting the null texture is because your textures don't conform to the game standards,your texture must be in sizes of:
16x16,16x32,32x32,32x64,64x64,64x128,128x128,128x256,256x512,16x1024,512x32

those are examples but combinations like that