urgent! .cer certificate installation problem..

Hi everybody,

i am going crazy with this problem I have on Vista.

I work in a company that uses Outlook Web Access for remote emailing. I just
bought this new PC and I have the .cer file with the certificate of my
company.

I go to certificate management utility and try to import it into the correct
Folder, but even if it says that the import has been completed, the
certificate still does not appear. In this way when I try to access OWA it
shows me a certificate missing alert, and I cannot use standard outlook at
all!

Anyone has any idea about this problem?

thanks a lot,