VIEW LINES BEHIND SHEETMETAL PARTS IN ASSEMBLIES

Hi all

I have a issue and have had it since 2008 and am currently on sw 2011 sp4 and am still haveing the same issue

you can see lines from other sheet metal parts behind sheet metal parts in a assembly but when you zoom in they disappear.

I have tried changing all my performance settings  in SW and has no effect

I have dound another post which was a fair while ago and am wonndering if anyone knows if there is a way to fix this

https://forum.solidworks.com/message/32547#32547

I am pretty sure it is not my system but i will put what i am currently running

nvidia qaudro 4000

windows 7 x64

12 gig ram

intel Xeon X5660 @ 2.80 GHz

SW 2011 sp4

SolidworksSheet Metal