Loading DWG can't see it all?

Hi all,

I'm a newbie to eDrawings (free).......have tried loading a3Dmodel off a vessel with lots of pipework and valvesetc (fromAutoCad) into eDrawings and it renders, but it'smissing a lot ofthe pipework......?
I notice that when I first load the DWG into eDrawings that Icansee all the pipework, it's just that as soon as I try to shadethemodel half the pipework just dissappears. If I then un-shadethemodel then the pipework stays dissappeared.
The only way I can get the missing pipework back is to hitthe HOMEbutton.

When I load into AutoCad or DWG Trueview I can seeeverything.

I'm using the latest eDrawings (Windows XP) justdownloadedyesterday.

Any ideas?
SolidworksEdrawings