You need to change in system properties or set it on your command prompt where you run your application.
im sorry but could you tell me how to do this - step by step
because it isnt in environmental variables and other than that - im out of ideas
i`ve writen set BRT_PERMIT_READ_WRITE_ALIASING 1
and win7 writes that there is no environmental variable of that name
edit2 i`ve made this variable and set it to 1 and it writes error - you can use that variable to permit read-write ops