Thread: Need Help Multi Patching Pointer

I want write memory with multi patching pointer..
when i inject my dll the game crash....

whats wrong with my code??? wrong target ??
this my code ...

DWORD dwI3EXEC =(DWORD)GetModuleHandleA("PointBlank.i3Exec");
if (dwI3EXEC!=0)
{
DWORD BaseDMGK = (DWORD)dwI3EXEC+0x12345; //base adres
DWORD Ptr0 = *(DWORD*)(BaseDMGK);
DWORD Ptr1 = (DWORD)(Ptr0+0x124); //pointer 1
DWORD Ptr2 = *(DWORD*)(Ptr1);
DWORD Ptr3 = (DWORD)(Ptr2+0x512);//pointer 2
DWORD Ptr4 = *(DWORD*)(Ptr3);
DWORD Ptr5 = (DWORD)(Ptr2+0x440);//pointer 3

WriteMemory(Ptr5,(void*)(PBYTE)"\xFF\xFF", 2);

this the pointer PointBlank.i3Exec+12345 offset 124, 512, 440