Side Bar Item thing not working

[meowmeowpie]

Title: Side Bar Item thing not working

Version: 3.1.2

OS: Labtop Toshiba

Java Version: 7.8 or something

Description of Problem:

Side Bar InvTweaks isn't working please TELL ME WHY!!!

Error Messages:

Error Log:

[Hushful]

145: Does it really matter?

[Jorcer]

144: You just made me miss the light rail.

146: What is a light rail

147: Anyone else notice we stopped giving tips and are now really just conversing

148: We should probably move back to kitty jail

[GreenWolf13]

149: It's the Pheonix Metro. It's like an above ground subway

150: I agree

151: The 150 tip was mine!

[Hushful]

152: Red alloy wire has a much longer signal length than regular redstone.

[LazDude2012]

42.5: If, using WorldEdit, you accidentally place a TileEntity in the Void, Minecraft will crash every time you load that map from then on. (may also work with deployers, for ultimate griefing)

42.65: There are 3 rules to The Game.

42.65a: #1: You are always playing The Game. The Game never stops, and you cannot stop playing The Game.

42.65b: #2: When you think about The Game, you lose The Game.

42.65c: #3: Loss of the Game must be announced in some way.

42.75: Tip numbers don't necessarily have to be integers

42.85: C# is possibly the best programming language ever. Of all time.

42.95: Faster than light travel isn't our current problem, deceleration from FTL is.

43.05: Everyone loves a flamewar. Go ahead, try it! I'll start first: Dubstep sucks.

[freakachu]

wtf is this shit?