Help please - winmail.dat attachment on air but not imac

[mrg527]

I'm hoping that someone might be able to help me fix a problem I am having in Entourage 2008. I have Office 2008 installed on my Imac core 2 duo running Snow Leopard 10.6.8 and on my Macbook Air I5 running Lion 10.7.1. I am running version 12.1.9 of Entourage on both machines. When my wife e-mails me an attachment from work, I receive it fine on my Imac but the Air receives it as a winmail.dat attachment that I have to convert (I am using TNEF's Enough). I know the problem is usually caused by the sender's settings, but I have checked them and they seem to be correct. Since I am running the same version of Entourage on both machines and the Imac receives the attachment correctly, I am wondering if this is somehow related to Lion running on the Air. Has anyone else encountered this or does anyone have a possible solution? I'd like to be able to receive the attachments correctly on the Air without having to go through the extra steps of conversion. Thanks in advance for any advice or help that you can offer.