https office file download with IE

Hello to all,

I'm italian and my english is quite poor, so excuse for my english...

I had configured Apache with SSL to implement an https server.
Naturally I use Apache(SSL)+PHP+MySQL.
It seems to work properly... until you don't use MS Internet Explorer!!!
When you try to dowload an office document, like explained in the MS site, IE signals an error

support.microsoft.com/kb/316431/en

MS suggests to eliminate the no-cache directive but I can't make it to work...

someone can suggest anything to me (different by "don't use IE!") ?

Thanks