1. Go to this link and generate a new MAC. hxxp://www.hellion.org.uk/cgi-bin/randmac.pl?scope=global&oui=00%3A1A%3A78&type=mult icast. Replace xx with tt.
2. Associate the new MAC with your donation. If it fails, repeat 1 and 2 until it accepts the MAC.
3. Put the new MAC in your client.