Normally, your computer should've enabled the adapter for busmaster operation during power up. This computer didn't. The EtherExpress(tm) PRO/10 PCI LAN adapter Setup program and all PRO/10 PCI drivers take care of this problem for you in most cases. However, if you have problems with your adapter failing diagnostic tests, move the adapter to another slot in your computer and try the test again. If you still have problems, contact your network services supplier.