IE9 not handling .ashx files correctly

Hi,

I'm having problems with 1 machine and the way it is handling .ASHX files from websites. The website I am using for testing is this one http://ggpweb.uttlesford.gov.uk/CMISWebPublic/Default.aspx but I am assured by the user that the behaviour is common to all similar websites that use .ashx

On correctly working machines, using either IE9 or Firefox 9 clicking on one of the document links on the right hand side of that page results in a dialog box aksing "What do you want to do with Binary.doc?" or "Binary.pdf" or whatever the target document file type might be. On the machine that is not handling .ashx correctly the dialog box asks "What do you want to do with Binary.ashx" regardless of the target document file type.

Following the download process through to conclusion, clicking Open on a working machine launches an appropriate application window and loads the document, clicking save launches a Save As dialog allowing the document to be saved in it's correct format. On the non-working machine clicking Open causes a "What should I open this with?" type dialog and cliking Save launches a Save As dialog with Binary.ashx as the save name. Saving the file as .ashx and renaming it to .doc or .pdf as appropriate allows the document to be opened but this is obviously not the desired behaviour.

I have tested this website on both on 32 & 64 bit machines using both 32 & 64 bit versions of IE9 where appropriate. I have tested the site with both windows 7 & windows XP machines using IE9, IE8 & Firefox 9. In all cases the website behaves as intended by the designer on the working machines and as I have described on the non-working one.

The non working machine is 64 bit running windows 7 & IE9 and is less than two months old. It has all windows & .net updates installed along with Office 2010 starter edition.

As the website works on other machines I suspect that the problem lies within the non-working machine rather than the coding of the website. Also the fact that the behavior on the non-working machine is the same regardless of browser I suspect that there is something global that is wrong rather than just an incorrect setting in IE9.

I have checked the "Do not save encrypted pages to disc" option as suggested as a solution by other technical websites but this does not appear to alter the behaviour or either the working or non-working machines. Most other information I have gleened for various webistes is that other people with this issue are downloading the files and renaming them, but as there is obviously an issue with this machine and I'd like to see if I can find a solution.

Can anyone help?

Thanks

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