adding textures need help

i have been getting this problem since 109.4 i try to put in textures intro a wad i made, and all i get is the srb2 doom builder telling me its missing the main textures . i had someone put the textures in thank you but when i tried to add more, the srb2 doombuilder went back to saying its missing the main textures that are in the game! what do i do?

Tip: Try to rename the texture1 lump into texture2