Thanks for your answers.
I imported (open then import) a TM (tmx file) created with "Across". I'm asking you because in this software, when all the segments are translated, the software offer you to add it all in TM automically, or continue the task.
That thing isn't clear for me with SDL Trados.
Please, may you help me about how to create these Batch tasks?
... I would have expected you to be confirming (ctrl+enter) as you work. This action sends the translation to the TM so under normal circumstances, when you are the only one in the workflow there is no need to run a batch task anyway.
However, if you someone have a translated file in Studio that has not been added to the TM as you work then you can do the two things I mentioned. You don't have to create this batch task... it's already there:
Project -> Batch Tasks -> Update Main Translation Memories
I have the feeling that these answers are way off what you are actually doing. Perhaps you could explain, step by step, what you have actually done in Studio and then we can give you a more helpful response... I think.