Step 1 - Open up Client.java and Search for:
setLowMem();
Step 2 - Replace it with:
setHighMem();
If the above didn't work
Step 3 - Replace this in run.bat
@echo off
Title Client
cd ./Class/
START javaw -Xmx1500m Gui 30 0 lowmem members 32
exit
With this
@echo off
Title Client
cd ./Class/
START javaw -Xmx1500m Gui 30 0 highmem members 32
exit
Compile and Run your client and it should run 100%
Credits go to me for posting and making a tutorial for this.
75% - Me
25% - Ricky v (for helping)