NIS2009- symantec download manager " communications error''

Hello guys,

Yesterday I've downloaded a free update of NIS2009 since I have NIS2007 but in the symantec download manager window says "communications error" and I can not download the exe. My system is Vista premium Home.

Today I tried to do the same thing at work where the system is XP pro and the program starts download.

 

Does anyone can help?