PPTP VPN not working on OSX 10.9.2

My PPTP VPN to my office was working fine for more than 1 year.

However, in recently weeks it doesn't work anymore. The message I got as the following screenshot.

I believe the upgrade of 10.9.2 is the cause

I also have Windows VM (parallels) on this box (MBA2012mid), the Windows VPN work very well before and now.

It's very frustrating. (for me, VPN is used in urgent situation when I'm not in office). Can't believe Windows beat OSX at this feature.

Anyone have the same issue ? please share the solution. thanks

Update: Same issue happen on my iPhone5S (iOS 7.0.6)