It`s not a classic 404. The correct Message can you find in my first post. "Die Internetkonnektivität ist verloren gegangen." The page return no Data. "The connect was lost". The Browser wait for Data. The IIS switch between default.asp and register.asp endless. In the LOG no further data are contained. IIS gives no meaningful request for the browser.
It could be helpful, now to examine which variables between the sides are exchanged.(?) But how? the User Name: DOM-AV\newfranz and register.asp mode=DoIt read in the log, seems to be correct. But is this automaticly the Member-Name and the Account Name?