First of all there is absolutely nothing wrong with your English :o)
Is there any other way you can capture network trace from the transaction? Maybe other tools like netmon are already installed on the computer? There are some other network tracing tools awailable out there but they all will require admin rights to install....
From description of your problem it is very likely that your proxy blocks or modifies some of our network requests and therefore Office Live Workspace application does not work. Another very likely cause is that IE security settings too high like JS or cookies are not allowed and application does not work? Can you please check Tools->Internet Options->Secirity settings for IE to see is set for Internet zone there? Maybe you may try to add http://workspace.office.live.com to Trusted sites and see if it makes any difference?
If none of this work, do you see any warnings or java script errors in IE (lower left corner) when Office Live Workspace fails to load?
Thanks,
Anton