FortiSSLVPNclient not connecting

I'm connecting to a FortiGate 101e with the VPN client.

I installed the Windows version FortiClientOnlineInstaller_6.0 and with this "permanent" client I can connect fine.  I then removed this client and rebooted.  I then downloaded the FortiClientTools_5.6.6.1167 zip file.  

Using the command line interface, per the instructions I found on FortiNet's documentation in the KB, I'm trying to connect to my VPN as such:

C:\>FortiSSLVPNclient CONNECT -h IP4ADDRESS:PORT# -u Username -p Password -i -m

I've tried several variations including using -c VPNPROFILENAME where VPNPROFILENAME has all the connection and authentication information stored, etc.

Nothing works.  Even though I provide all the credentials it pulls up the GUI in Windows and shows it disconnected.  When I click connect it flashes through re-trying up to 10 times and returns to the disconnected state.  All of the information and credentials are correct but I can't get it to connect. 

I reload the Windows FortiClientOnlineInstaller_6.0 app and it once again connects fine.

I can see on the internet that others have had trouble getting the CLI to work too.  Is there a way to get this to work?  Maybe I need an updated version (6.0?) - I can't find a newer version though.

Thank you for your input.