AutoCAD Mechanical Launch Problem

[keharacek484393]

First, I would like to say that I'm not sure if this thread is in the right section.

Hello, I would like to ask you if someone here has the same problem as me.
The problem is that when I launch AutoCAD Mechanical (Student Version) it launches and shows me this error () - It's in Czech language, but it says that Security System (License manager - software key) isn't in function or it is wrong installed. But, when I installed it, it worked for like 3 weeks and today when I tried to launch and do some work to school this happened. So If someone knows what could be the problem, please respond

Some Info
I'm running on Windows 7 64bit home premium edition, CPU: Intel Core 2 Duo E8500 GPU: Nvidia GeForce GTX650Ti RAM:8GB

Edit: Sorry guys for bothering, but I wrote email to my teacher and he said that he had this problem too, so I tried what he said me to do and it worked! There is what was wrong.. before 3 days i went to msconfig and I accidentaly switched the Flexnet licensing service off. So if you have this problem too, just take a look into msconfig to services tab

[Opie]

Thank you for posting your solution.