Thank you cpigilam, but I tested and it didn´t work. I tried to do to put this ensambly code in my code and didn´t change ASIX.lib but didn´t work too.
ld a,0x20 ; change to page 0
ioe ld (PD_WR1),a
ld a,0x10 ; place nic into promiscuous mode
ioe ld (PD_WR1+PD_RXCFG),a