Robbe, welcome to the windows 7 forum.
Posting a question in a foreign language most likely will not get you many answers.
Use google translate.
like this
"if someone sends me an email containing a annexes I want this first open without saving but all I click open nothing happens what should I do?"
this apparently is Dutch.
If you receive attachments and they don't open. Make sure they are not trojans or virus by using your Anti-Virus program against them.
Rich