FTP not connected through Squid

[***some text missing*** <shozii1@xxxxxxxxx>]

Hello Team,

I am having error while connecting FTP from Filezilla behind the squid. My Scenario is my client is 

squid client trying to connect internet FTP on port 21 through FileZilla and from Webbrowser as well, 

but unable to access from both ways. I have monitored a specific IP in access.log but get no request 

from particular client. Error received on FileZilla is "connection timed out" "Couldnot connect to 

Server"

Any help.

Regards,
Sarfraz