Windows .exe Launcher not opening Horizons pack

[VitminV]

When I attempt to launch the Horizons pack from the FTB launcher, information appears in the console, but nothing happens. After all of the info popped up, the launcher goes back to as it was before, allowing me to attempt again, with the same results.

Here's my Pastebin: http://pastebin.com/LE2uGNXM

Thanks
-VitiminV

 

[Minecrafter1134]

Exception in thread "main" java.lang.NoClassDefFoundError: com/google/common/collect/Lists

skimming the contents of that pastebin, I'd say this looks to be your issue. The solution, however, is unknown to me.

 

[VitminV]

skimming the contents of that pastebin, I'd say this looks to be your issue. The solution, however, is unknown to me.

Thanks, I'll do some more digging about this error.

 

[PlanetOrb]

I had that error when I run Optifine with it. As soon as I remove Optifine it will boot up all the way. Not sure if that will help you out or not.