[xubuntu] VPN says "invalid VPN secrets"

hi,
I am trying to lea networking, vpn's, etc, and I just recently installed a VPN using openVPN.
I got an account with vpnbook and every thing worked fine for a day or two, but now
when I try to coect, I get:

VPN Coection Failed
The VPN coection 'VPN coection 1' failed
because of invalid VPN secrets