FreeBSD 6.2 installation

[timipl]

i Can't use FreeBSD 7.1 or 7.2 because i have 10 server's configured as WWW+Haproxy (works perfect) and this operation is very big deal for me right now. Btw 7.1 is to stable like 6.2 i try with 3 machines with 7.1 and in apache benchmark test 6.2 had better result than 7.1 .
After installation and run setup installation i get this errors :
postmap: fatal: open /usr/local/etc/postfix/ispcp/{aliases,domains,mailboxes,transport,sender-access}: No such file or directory
Can't exec "/usr/local/sbin/makeuserdb": No such file or directory at /usr/local/www/ispcp/engine/setup/../ispcp_common_methods.pl line 759.
ERROR: External command '/usr/local/sbin/makeuserdb' returned '72057594037927935' status !
testserveredge4# /usr/local/sbin/makeuserdb
/usr/local/sbin/makeuserdb: Command not found.

i don't understand why ispcp want makeuserdb yet this command exist in Linux ?
Regards