Please note that none of my system settings have changed since I was able to login fine with the Crysis 2 MP Demo, and the Full Game until today as it wont connect any longer giving me a very odd message:

ATTENTION
An error has occured. Please check your network connectivity

Again, I've changed nothing in my system settings and meanwhile i am able to login fine with my account in this site or any other site.

I have disabled firewall, still didnt make any effect, even thou yesterday the firewall was on and i was playing online.

What in the world is going on with this game???