Cannot see the preview of Parts in the windows.

Hello friends,

I have Solidworks 2009 SP5 installed in my Win 7 X64 workstation. From past few days I am not able to see the preview when I try to open the part using File-->Open-->*Solidwork files. Can anyone please let me know what I could do for that. It is a huge assembly and I have to open the whole to look at one part. It takes a lot of my time.

Regards,

Pavan Kumar.

SolidworksAssemblies