Articulate Studio '09 content may not track in Articulate Online when it's viewed in Internet Explorer 11.
This issue was fixed in Update 10 for Studio '09.
To publish content that works with Internet Explorer 11:
Install Articulate Studio ’09 Update 10. Content published with Update 10 will track properly in Articulate Online.
To update existing content:
We automatically updated all Studio ’09 content in Articulate Online on February 24, 2014. If you have questions or concerns, please let us know.