Shoutbox

(click to enlarge)

Edit: I uninstalled AeroSnap, didnt work
Disabled all Security Software, didnt work either (also: i actually had them even before i started using MsnPlus! Live)

There's loads of "AntiVirus", "InternetSecurity" and "Personal Firewall" processes I can see running. Just disabling doesn't always work, the processes are still running and can therefore interfere. You need to uninstall them or disable them running at start-up (msconfig or AutoRuns) so they cannot interfere.

Once you've done that you can restart your computer, check the proccesses aren't running, then run WLM. Reinstall if necessary.

TuneUp Utilities also looks like an unnecessary program.

Plus! isn't working because something on your computer is blocking it. To fix the problem you need to disable or uninstall any possible software (specifically security software, like mentioned) that are running on your system. We cannot do this for you.