ldirectord FTP TIME_WAIT problem

[LongJohn <longjohn@xxxxxxxxxxxx>]

Hi to all!
I've got a problem using ldirectord "mapping" FTP
The problem is that doing 'netstat -na' I see many connection from director to 
intranet PCs on port 21 (FTP ;) ) and the status is TIME_WAIT .
The problem is still present on the bootstrap
Here's my *.cf file:

# Global Directives
checktimeout=3
checkinterval=1
#fallback=127.0.0.1:80
autoreload=yes
#logfile="/var/log/ldirectord.log"
logfile="local0"
quiescent=yes

virtual=x.x.x.76:80
       real=10.0.0.4:80 masq 6
       service=http
       scheduler=wlc
       persistent=600
       netmask=255.255.255.255

virtual=x.x.x.74:21
       real=10.0.0.8:21 masq
       service=ftp
       scheduler=rr
       persistent=600
       quiescent=no
       netmask=255.255.255.255
       protocol=tcp

virtual=x.x.x.75:21
       real=10.0.0.5:21 masq
       service=ftp
       scheduler=rr
       quiescent=yes
       netmask=255.255.255.255
       protocol=tcp

virtual=x.x.x.76:21
       real=10.0.0.4:21 masq
       service=ftp
       scheduler=rr
       quiescent=yes
       netmask=255.255.255.255
       protocol=tcp

Thanks to all
Enrico