problem running a deauth

[golfer]

hey, so I am haveing a problem today i am trying to run a deauth in BT5.
here is the command

aireplay -0 0 -a my mac address eth0

here is the error

ARP linktype is set to 1 (Ethernet) - expected ARPHRD_IEEE80211,
ARPHRD_IEEE80211_FULL or ARPHRD_IEEE80211_PRISM instead. Make
sure RFMON is enabled: run 'airmon-ng start eth0 <#>'
Sysfs injection support was not found either.

any help is appriciated

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