Resolved! aaa authorization commands levels
I configured the ff. commands on my router:R1(config)# aaa new-modelR1(config)# tacacs-server host 172.16.178.3 key xxxxxxR1(config)# ip tacacs source-int fa0/1R1(config)# aaa authentication login forCONSOLE group tacacsR1(config)# aaa authorization ...