how to fix problem with clicking and shifting problem with mods minecraft

[blasterblade]

when i pick up a block i have to hold the left button and cant half when right clicking making it extremely hard to craft and cant shift click items from chests into my inventory its happening when i use mod-packs and mods on minecraft

 

[jwk3]

I'd suggest going back to the stock client, and then install the mods one by one until you can get the issue. it's also advised to use a "modloader" style mod to improve the mod compatibility.

 

[Windmm]

Find out on this website about Minecraft Mods, maybe it can help you!