save word from web page

i need to open a word document inside a browser using asp.net,i used response.contenttype="appliaction/msword" ,it work fine, it opens the document in the same browser itself, when i made any changes to the document inside the browser i need to save the changes, but i canot able to save , the save option is not functioning inside the web page, plz suggest me some solution
thanks
regards
malar