If you use W7
Install QuickVPN client ,dont change compatibility mode..
Make sure the Windows 7 firewall is turned on.
Restart your computer then:
1. Right click on Computer Icon
2. Select Manage
3. Select Services and Applications
4. Select Services
5. Sort by Name
6. Look for and right click on IKE and AuthIP IPsec Keying Modules (Should not be disabled, if so, do the rest below)
7. Select Properties
8. Make Startup Type be: Automatic
9. Restart PC and try QuickVPN..