did u execute aireplay-ng command
aireplay-ng -3 -b 00:13:10:30:24:9C -h 00:11:22:33:44:55 ath0
-3 means standard arp request replay
-b 00:13:10:30:24:9C is the access point MAC address
-h 00:11:22:33:44:55 is the source MAC address (either an associated client or from fake authentication)
ath0 is the wireless interface name
also u should have wireless with injection on to work
what is u r wireless chip card ?