How can I get upgrades of SF6 ?

[HayoOellrich]

I am working with SF5 and with SF6. Still have version 6.0.0.0.

The automatic check for new version in SF6 (via TrueUpdate) fails each time:

=====================================
Could not download update information.

Update information file #1
Unknown error.
Possible causes:

1. You are not connected to the Internet. Please connect to the Internet and try again.

2. The Internet server that you are trying to connect to is not available at this time. Please try again later.
=========================================

Next message:

Setup Factory 6.0 is not properly installed on your system
and cannot be updated at this time.

Please contact Indigo Rose Corporation for more help.

Whats wrong here ? Want to get the latest update !

Thanks for your help.
Hayo