If you have done what is mandatory to automate Flash application, introspect your object and you'll find the name/class of your tree. No difficulties.
If you haven't done the prerequesites, look at documentation before asking here.
Un sourire et ça repart
In order to make TestComplete recognize your Flash application properly, you need to prepare the application and the TestComplete project according to the following article:
Please follow the steps from the article and let us know if you still don't see objects in the object tree.
SmartBear Community and Education Manager