opening TIF attachment problem in OWA

Hi

One of our users using Outlook Web Access (OWA) can't open TIF attachments while in the Web browser, but can save them on their system. Is there any way to allow these attachments to be opened?

Normally when we have had this problem before we just go to

My computer
Tools
Folder options
File Types
Reassign the TIF file to the correct application or delete it and create a new one.

Have tried this method but doesnt work, any suggestions of what could be wrong? Its only affecting one machine. Have tried to reset the internet browser settings as well.

Thanks

Its alright a bit more googling I managed to resolve the problem:

PC Tech Go: Attachment.ashx Message when Opening Attachment in OWA Exchange 2007

It a setting in IE7 under advacned, security settings. I needed to uncheck the box which said "Do not saved encrypted pages to disk".