The t2 packet error you are seeing is because you set the bank size too high.
in config.java set the BANK_SIZE to 350 or lower.
Ah yeah!! that makes sense, shit i was trying to upgrade the bank space..
I believe the packet error comes about because the bank does not have enough inventory slots in the code.
If you modify the bank code in the client and increase it's space there, then maybe you won't get the t2 error.