Performance Overview and Plugins do not work

Dear All,

as the topic mentions: I can not open the performance overview tabs within the vSphere client and the vSphere Client can not download the plug-ins (e.g. the vCenter Service Status plug in). After searching the web for a while I can not find anything wrong in my configuration. The root cause seems seems to be that the tomcat does not listen on port 8443. What could be the reason for this?

C:\Users\Administrator>netstat -ano | findstr .8005

  TCP    127.0.0.1:8005         0.0.0.0:0              ABHÖREN         101160

C:\Users\Administrator>netstat -ano | findstr .8009

C:\Users\Administrator>netstat -ano | findstr .8080

  TCP    127.0.0.1:8080         0.0.0.0:0              ABHÖREN         101160

C:\Users\Administrator>netstat -ano | findstr .8443

  TCP    0.0.0.0:18443          0.0.0.0:0              ABHÖREN         4

  TCP    [::]:18443             [::]:0                 ABHÖREN         4

The process behind port 18443 does not work, because it returns a 404 for every URL on that port.

I'll attach the server.xml from my tomcat conf. I'm running vSphere 4.1.0 on a Windows 2008 R2 Server.

Thank you in advance!