I can't install Windows 2008 Server

[thompson38]

I have license for Windows 2008 Server. I got it from the school. I was studying a course on Server Visualization. It was an 18 months course.

School arrange me to get the program from 'dreamspark.com' website. I have used for about 2 years. Last week I reformatted the hard drive and tried in vain to install it.
I got a message saying this is an illegal product.
Why is that?
I have the license key with me.
Please help me.

 

[RSchwarz]

Was it installed before with the key you are trying?
If it was then the key is no longer valid. Dreamspark keys are MAK keys good for one install only.

 

[thompson38]

Thanks BSchwarz for the reply.
Yes it has been working for about 18 months. I just reformatted the hard drive and tried in vain to install it.
I had several partitions on the hard drive. In one I had Windows 2008 Server. The other partitions were different Linux versions.
As a matter of fact, I had 2 hard drives. One got broken. So I was forced to remove it and reinstall all the programs.

I didn't know this point. You can't install twice!
I have downloaded Windows 2003 Server Program and SQL and lots of other programs from Dreamspark. I have never ever installed them.
They should work. Am I right?
What is MAK?