Qlikview web part works with sharepoint 2010.
For that you need to have qlikview server V10 and above release, as V9 is not suported for sharepoint 2010.
secondly you need to have a special licence for sharepoint integration with qlikview.
Also you need to have a webpart installer that comes from qliktech.
I will attach a sample document to work with qlikview sharepoint webpart.
Hope that helps