yu gi oh tag force 6

[I Hate Snatch Steal]

Whenever I try to use cwcheat codes, namely all cards and the master code (without the stuff in brackets entered of course):

[master code]
0xC17FF874 0xFFFFFFFF
0xC06D6AD4 0x00000000
0x506D6AD8 0x00000004
0x017FF874 0x00000000
0x217FF878 0x00000001

[all cards]
0xC17FF878 0x00000001
0x617FF874 0x00000704
0x0004150C 0x00006870
0x90000002 0x00000000


I get this error:

exception in thread "hle cheat thread" java.lang.nullpointerexception at jpcsp.cheats.gui&cheatsthread.run <cheatsgui.java 220>

can any one help me please?