Fortinet SSL client for OS X - version 4?

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I have a Fortigate FGT50B .. I can connect to it with Windows SSL client version 4.0.2143.0. Great ..

Now I want to connect with a Mac OS X client. I have tried version 4.4.2297 but it always errors saying check the credentials or certificate. 

I tried to log into this 

ftp://support.fortinet.com/FortiGate/v4.00/4.0/4.0.0/SSL%20VPN%20Clients/

but it prompts for a username and password. 

Can anyone help please? 

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ok I got that OS X version 4.4 working by setting port 10443 instead of 443