Strange preview of eps in LyX

[Gunnar]

Hello.
I've inserted the following eps file in LyX 1.3.6 (gentoo linux) 

%!PS-Adobe-3.0 EPSF-2.0
%%BoundingBox: 0 0 200 140
/mm {2.834646  mul} def
10 10 translate
0 10 120 {
        dup 0 exch  moveto 180 exch lineto
} for
0 10 180 {
        dup 0 moveto 120 lineto
} for
stroke
showpage

The lines shows up nicely in LyX, but it is placed on a huge white background. 
Very anoying.

Any ideas on how to get it to only display the actual picture? Trying to use 
"clip to boundingbox" doesn't change anything either.