Installing OSX Snow Leopard Server 10.6.3 in Parallels 8 FAILS - HELP?

I am trying to install OSX Snow Leopard Server 10.6.3 in Parallels 8, having gone to the trouble of tracking down this OS. I have previously successfully run a modified version of Snow Leopard on the same Mac/OS/Parallels combo but I want to do this the "proper" way. After installing, SLS Parallels fails to boot from the installation, with an error message that it can only support Snow Leopard Server or Leopard Server. Any ideas on what might be going wrong here?
Thanks in advance for any advice!

 

Hi benevision,
Parallels Desktop 8 for Mac supports Snow Leopard Server 10.6.x as guest OS.
Please re(install) the Virtual Machine and check how it goes.

 

Thanks for your advice, I followed the instructions in your link and it is working!
HOWEVER the Snow Leopard Server VM only displays in a small window. When I click the full screen button it just enlarges the pixels. I've looked in Preference settings but I can't see how to make the installation use the full resolution of my Apple monitor...

 

Hi benevision,
Click on Apple icon > System preferences > Display and change between Scaled or Retina and see if the display changes to normal.