parseConfigFile: line 623 unrecognized: 'dns_children 20'

hello squid users,
        
   can you help me what caused this error message ?

 parseConfigFile: line 623 unrecognized: 'dns_children 20'

i just uncommented that line and changed the default 5 to 20

i'm using 2.3 stable2

--
m  i  c  h  a  e  l   v  i  n  c  e  n  t   p  o  z  o  n
          ::  mikevince@netexecutive.com  ::
---------------------------------------------------------------
HPS Software & Communication Corp.     ICQ : 1413343
Pilipino Internet Cebu              office : (+63)(32) 3447847
Systems/Network Administrator       home   : (+63)(32) 3446427
- - - - - - - - - - - - - - - - - - cell   : (+63) 917-3276966
 - - - - - - - - - - - - - - - - -  http://mikevince.tripod.com