SBS2003 CompanyWeb files access authentication problems

I am accessing my CompanyWeb externally via port 444. I login with my user name and password.
I can open files of type .pdf .txt, etc. but when I try to open Word or Excel Documents it asks me again to enter my user name and password.
ernestopAsked:
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ernestopAuthor Commented:
Pressed Enter too quick.
Thanks in advance for your help.
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Andres PeralesCommented:
Have you added this site to your trusted sites?
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thompsonwirelessCommented:
This is a bit of reading but it explains how Office works and why it requires authentication.

http://support.microsoft.com/kb/838028
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ernestopAuthor Commented:
well I have found out if i use firefox i don't have the problem - so that means the issue is in IE ( Iam using v8) I tried with version 7 and had the same problem. Any ideas where this might be diabled. I tried the suggestions above and none of them produced an answer to fix the problem ..anymore thoughts
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