How to troubleshoot ftp issue with cyberoam

ftp from lan to wan is not working for outside linux server, after creating

LAN – WAN ftp rule and move it to top after dns rule

cyebroam chat support suggested to go thru few documents which i am posting here.

http://kb.cyberoam.com/default.asp?id=60&SID=&Lang=1

http://kb.cyberoam.com/dosearch.asp?Lang=1&SID=