Hello,
please note that IE 11 is not officially supported in Alfresco 4.1.9 - actually, changes with IE 11 were significant enough so that other major functionality would not work correctly. IE 11 supports was added in Alfresco 4.2 - I don't know how much of this has been backported to the 4.1.x service packs.
What kind of previewer are you using? If the Flash based viewer is used, please make sure the Flash plugin is activated correctly in IE11. Unfortunately, due to the IE 11 stuff I mentioned, it can also be any thing between loading the page and passing of data to the Flash plugin that goes wrong in IE 11…
Regards
Axel