BE3600 R2 IEProxy settings and update through Webinterface

I have read and applied the steps from this article: http://www.symantec.com/docs/TECH200660.

However, when starting 'Check and Download Updates' from the Webinterface, only Windows updates are downloaded, no LiveUpdates.

When starting LiveUpdate from the BE Console, the updates are shown and can be downloaded.

Why does the 'Check and Download Updates' from the Webinterface behave different than manual LiveUpdate ?

Regards,

 

Martijn