FTP Session being blocked by FWSM access list

[PacketSpartan]

We have a client that's trying to connect to a FTP server on the internet,  

We have an internal firewall (cisco FWSM) and an external fw (Fortinet). We have come across an issue when a user is trying to connect to a FTP server, the initial connection is being

Initial connection 

Source port : 57243

Destination port : 21

the second part of the connection is using destination ports that are not allowed via the firewall. The strange thing is that, this service was working before with the exact same firewall rules. When i repeated the test on the same network on a different vrf, the second part of the connection uses different sets of ports

I've tried with Winscp and Filezilla and i am just wondering if we can do anything on the FW 

Can anyone help ? 

[PacketSpartan]

Can anyone help, we seem to have more and more users who are unable to connect via FTP. 

[Mohammed al Baqari]

Are you using active FTP or passive FTP? 

Do you have FTP inspection configured in your global policy.

[PacketSpartan]

We are using Passive and We do have ftp inspection enabled globally on the fw