[tac_plus] bug?

[i.anfrage]

hi,

i´m trying to start tac_plus with

user = fred {
        login = cleartext abcdef
        service = shell {
                cmd = write  { permit terminal }
                cmd = configure { permit .* }
        }
}

as shown on many different websites. but i always get

Error: expecting 'string' but found 'cmd' on line 34

what´s wrong?
i´m using tac_plus version F4.0.4.14

tia

tom