Error 51: Unable to communicate with the VPN subsystem

[noctech73]

Cisco VPN Client was successfully installed on a MacBook Pro, OS-X 10.6.7. No issues importing the .pcf file.

However, when executing the Client an error -51 is returned stating "Error 51: Unable to communicate with the VPN subsystem".

What is causing this and how may it be remedied? Disk permissions have been repaired. I located an article here that is a workaround but not a fix. E.g., the command of "sudo /System/Library/StartupItems/CiscoVPN/CiscoVPN restart"

Many thanks!

[Craig Lorentzen]

Please review

https://supportforums.cisco.com/docs/DOC-3613

Use the Mac OS X Built in VPN client.

-Craig

[skappiris]

this error is also occuring on Windows 7 OS. Users with McAfee Hips installed will have to STOP the Hips service before the VPN client will start properly.