pf firewall and ftp

[Fbsd8]

Running 9.0 as a gateway host with pf firewall enabled.
FTP is launched by inetd.
Both active and passive ftp works from lan pc's to the host ftp.
The lan ftp session can be initiated from the host or any lan pc and 
things work because there are no rules on the lan interface except 
single pass all rule.

But I can not do host initiated or lan initiated ftp sessions to the 
public internet. Get "operation not permitted" message. Tried to setup 
ftp-proxy per openbsd pf manual without any joy.

Looking for working rule set with nat and ftp services to study and 
learn from.