PNG Problem on Windows 98

For clarification to my first email (PNG Problem on Windows 98 ), i'm using
R 1.8.1

<.....with the new version of R it is normally no problem to produce very
fast
<graphics in the png format.
<
<In the office i want to work with R - Windows 98 is used.
<There are french versions and english versions of Windows 98 second
edition.
<
<The png graphics are only on one computer correct.
<On the other computers - the x-axis labels, the legend text and the "mtext"
<(on the bottom) is missing. 

Johannes