mapserver - windows 2003

[Mauricio Stange H.]

hi,
    I have developed a couple of maps wtih apache and postgis, but now I 
need to migrate it to windows 2003, using de windows web server. So, for 
php and postgis there was no problem, but mapserver doesn't work. I do 
what the README-Install.txt says, (using C:/Inetpub/wwwroot/cgi-bin for 
mapserv.exe), but when enter the link 
"http://localhost/cgi-bin/mapserv.exe", but I recieve a "HTTP 500 
internal server error" The page cannot be displayed, blablabla.

Does somebody knows, how to successfully install mapserver under windows 
using IIS, or where is my problem??

thanks,
    Mauricio Stange H.