error go back to Layers

Hello,

I work for the company Ankama

For some time, we are a few to get the "divide to the layers' Flash CS3 that no longer works.

Now this is a feature that we use very often, but we do not find solutions for this problem.

When we execute, or selected elements disappear or the error message "Could not complete the operation because of an unknown error. "Appears directly. Then in any case, the plant software.

We tried to add RAM in our computers, reinstall the software, install the updates to this page http://www.adobe.com/support/flash/downloads.html but the problem persists .

Do you have a solution to this problem?

Thank you.