Try using urllib2, and putting urllib2 in front of the method calls. The add_password call needed an extra parameter as well.
[code]from urllib2 import urlopen
auth = urllib2.HTTPBasicAuthHandler()
auth.add_password(None,“https://www.mercuryinstrumentsmlb.com/dc2009web/Logon.aspx",“X”,"X”)
#create opener with auth attached
opener = urllib2.build_opener(auth)
#open url
opener.open(“https://www.mercuryinstrumentsmlb.com/dc2009web/default.aspx”)[/code]