Fatal Error and License error Autocad Design Suite Standard 2015

Hi,

We are using AutoCAD Design suite standard 2015 and we are facing

1. fatal error: Unhandled access violation reading 0x0009 exception ed67a41ah" and

2. license error. "Your license is invalid. Please contact your local authorised AutoCAD dealer."

It's successfully activated the license last May 15, 2014. The license we use are from subscription. Is there anyone can help me on this issue.

Thanks

Jm Mari