[exim] Configure not liking ACL

2005-02-03 09:49:27 Exim configuration error in line 13:
main option "acl_smtp_scanned" unknown

I get the above error when trying to add a custom ACL. I'm fairly
sure the ACL is OK, but I'm not sure if statements for custom ACLs
should maybe be placed elsewhere other than after the builtin
acl_smtp_data ??

Can anyone confirm or otherwise please?

thanks,

Doug