lightweight check box

Hi,
We are currently trying to open a few of our drawings inlightweight mode to save memory, but the check box within the opendialog box dissapears before we have time to check it. We have alsochecked the open automatically in lightweight in the performanceoptions but this also does not work.

This has only been a problem since we upgraded 2008 to 2009.

Does anyone know of a work around or fix for this problem.

Many Thanks

GarethSolidworksDrawings And Detailing