Still a problem.
first i started with a clean pc, downloaded the package 6.02.02 install and unpacked it.
at the ISP:
deleted the old and created a empty 2008 database
deleted all previous data and created an empty root folder
uploaded the install package, started the install process,
fllled in the credentials to install and it installed up to 6.02.02
the webpage shows and ...the error is still there.
i currently have no clue except for this hint:
I found this article and asked my hosting provider if they use ISA or another 'something' that does "Verify Normalisation"
http://blogs.msdn.com/b/jay_akhawri/a...
where the problem can be found in "Verify normalization"
Select Verify normalization blocks requests with URLs containing escaped characters after normalization.
Note: Web servers receive requests that are URL encoded. This means that certain characters may be replaced with a percent sign (%) followed by a particular number. For example, %20 corresponds to a space, so a request for http://myserver/My%20Dir/My%20File.htm is the same as a request for http://myserver/My Dir/My File.htm. Normalization is the process of decoding URL-encoded requests.
Because the % can be URL encoded, an attacker can submit a carefully crafted request to a server that is basically double-encoded. If this occurs, Internet Information Services (IIS) may accept a request that it would otherwise reject as not valid.
When you select Verify Normalization, the HTTP filter normalizes the URL two times. If the URL after the first normalization is different from the URL after the second normalization, the filter rejects the request. This prevents attacks that rely on double-encoded requests.
Note that while we recommend that you use the Verify Normalization function, it may also block legitimate requests that contain a %.
*Source: http://www.microsoft.com/technet/isa/....