Unable to connect fortissl vpn
I have a peculiar problem while trying to connect using fortissl vpn client. The firewall firmware is v5.0,build3608 (GA Patch 7). When I am trying to connect using the fortissl vpn client (ver. 4.0.2250), I get the message " Unable to establish the vpn connection. The vpn server may be unreachable (-5)" . I have no issue accessing the portal on port 10443. The page gets loaded from my laptop confirming port is not restricted, but it does not connect only i am trying to connect using the ssl vpn client. Parallely, when I try to connect another location firewall (v4.0,build0346,120606 (MR2 Patch 12)) I have no issues as i am able to connect using the same fortissl vpn client. Any ideas as what could cause such issues.
There are other clients, who connect to the same firewall (v5.0,build3608 (GA Patch 7)) and using the same fortissl client (ver. 4.0.2250), they have no issues connect to it.