Cant Cycle Through Textures

[jubjub]

Im am trying to mod Spiderman WoS but i cant seem to cycle through the textures. I can load other peoples suits and the instructions appear in the top left hand corner when modding. If someone could help would be grateful.

[SpiderBro]

use the + and - keys on the numpad to cycle through textures.

[jubjub]

doesnt work im on my laptop and ive tried that and the Fn with different keys i dunno what to do but thanks for the reply.