is there any specific reason why your using windows server 2008? have you tried windows 7? i would have to say that there is a slight chance you windows version is causing this!
Because they are VPS
How about windows server 2012?
the issue with windows servers is they require a mush larger knowledge base as to maintain and use them correctly! if you are absolutely requiring a windows server version then you might want to change mining software as im sure the nicehash miner works on a compatible system. windows 7/10 .windows server by default blocks many functions from the moment of install and even that is subject to differ depending on who created the install script.