Yes I know we've had shitloads of these ... but here we go again.

When installing Umbraco 6.1.6 on a clean MSSQL my installation halts at 5% "Connecting to database ..."
The SQL is a 2008 and the server is a Windows 2008 R2.

Regarding permissions I have NETWORK SERVICE with modify permissions.

In my console I can see that I get this error:

/InstallerRestService.aspx/InstallOrUpgrade 500 (Internal Server Error) 

The preview gives me this:

{"Message":"Therewasanerrorprocessingtherequest.","StackTrace":"","ExceptionType":""}

And if I open the link above in a new window and goes into view source, this is what I get:

<ul class="twitter summary" xmlns="http://www.w3.org/2005/Atom" xmlns:google="http://base.google.com/ns/1.0" xmlns:openSearch="http://a9.com/-/spec/opensearch/1.1/" xmlns:twitter="http://api.twitter.com/" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:thr="http://purl.org/syndication/thread/1.0" />

Any ideas ?
Anything you need to know ?