First Two Error Messages
To resolve the first two error messages, start the Internet Information Server snap-in, and then make sure that the BizTalkServerRepository virtual directory exists and is configured to allow Write access. If the virtual directory does not exist, reinstall BizTalk Server.
For additional information about how to troubleshoot WebDAV problems, click the article numbers below
to view the articles in the Microsoft Knowledge Base:
281942 PRB: Error Message: No BizTalk Server Repository Was Found on http://localhost/BizTalkServerRepository/DocSpecs
321546 PRB: The BizTalk Messaging Manager Error "The Download of the Specified Resource Has Failed" Occurs
Third Error Message
To resolve the third error message, change the group name reference in Setup.vbs or CleanUp.vbs. To do this, open Setup.vbs in Notepad, and then change the name of the BizTalk Server group in line 29 from "BizTalk Server Group" to the name of your BizTalk Server group. If the clean up script causes the error message, open CleanUp.vbs in Notepad, and then change the group name in line 102.