Minecraft ladders not working
I was playing minecraft for a while on MultiMC (minecraft loader) when I realized that I was unable to use any sort of ladder. I tried jumping, but I still fell back down and the game made the "climbing/descending ladder" sound. Anybody know what is going on?
MODS: TMI, forge, optifine, Mutant creatures, Tales of Kingdoms, Timber
VERSION: 1.5.2 (current)
OTHER INFO: I did NOT screw around with any config or data files in the jar, so this cannot be my fault.
Please help, I would really appreciate the effort!