MSN has both .com and index.html

[Abyss]

Hoping someone can help me. MSN has both the .com and index.html version of my home page listed in their index. I understand that this can lead to duplicate content issues. I contacted my server and he says that I can't use any of the url code re-writes because I am not on a dedicated server.

I would like to get this fixed but don't know how.

Any suggestions.

Thanks.