Hi Leif,
Thank you for downloading our software. I am sorry you are experiencing installation problems
The issue you experience is a common one and we have documented it in our release notes: http://www.infopathdev.com/files/folders/installation_and_setup/entry98284.aspx
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ERROR MESSAGE: CLIENT FOUND RESPONSE CONTENT TYPE OF 'TEXT/HTML; CHARSET=UTF-8', BUT EXPECTED 'TEXT/XML'
When installing DBXL (especially on servers with MOSS 2007) you may get the following error: Error initializing DBXL database. Client found response content type of 'text/html; charset=utf-8', but expected 'text/xml'. The error may also show as: "The installation failed, and the rollback was performed. --> An error occurred configuring system doctypes." The event viewer, in turn, will show: "Error bootstrapping system doctypes. Call to BoostrapSystemDocumentTypes at http://<servername>/QdabraWebService/ failed. Encountered a critical error and needs attention."
Here are some solutions to try if you encounter this:
A. This error usually relates to local machine accounts not having database administration rights or membership in the SharePoint permissions groups. Verify that the account you are using to execute the installer and the Network Service (or the account you are selecting for DBXL) have administrative permissions in SQL.
B. Once SharePoint is installed and the default SharePoint web site (on port 80) is provisioned, the "Default Web Site" on the machine is locked down. Typically, one would want to install DBXL on the "SharePoint - 80" web site. However, the initial configuration panel of the DBXL installer defaults to "Default Web Site". "Default Web Site" and "SharePoint – 80" are not the same, however -- ensure that "SharePoint - 80" is selected as the web site for installation.
C. Ensure that the SharePoint site (from B above) is not stopped in IIS.
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Please feel free to email Support (at) Qdabra (dot) com for a more rapid response. We look forward to serving you.