Big IP authentication on Cisco ACS

Anyone here with experience in authenticating on a cisco acs?

how can i get the acs group mapped to the admin group on the bigip?

i have setup tacacs authentication and added this on the f5

b remoterole role info administrator '{ 
     attribute "F5-LTM-User-Info-1=adm"
      role administrator
      user partition all
      console enable
      deny disable
      line order 1
}'

thx