Security Advisor - Failed to connecto to VMware GO

I want to try the Security Advisor but i get the error

I tested it with my local machine (user = administrator) and with an IP range.

1

Failed to connecto to VMware GOAn operation was unable to successfully complete. This operation requires a connection to the Internet

The Computer is set up behind a MS ISA but with configured proxy settings and  installed Microsoft FireWall Client for  ISA Server.

The Plugin is installed and activ.