Hi,
If you are under subscription you normally can have the LT 2011 without paying more.
To go to Subscription here is the link :
http://subscription.autodesk.com/sp/servlet/public/index?siteID=11564774&id=11607975
If you have problem you can download the trial which are the same as the commercial :
http://usa.autodesk.com/adsk/servlet/pc/index?siteID=123112&id=13706332&r=1
Then you put your serial number and the product ID.
Franck Hervet