dots in hatch won't print

Hello

Although  it seems good on the print preview :

The dots are not printed on any of my printers (DesignJet T120, Toshiba 281C and PDFCreator) :

All worked well a few time ago (is this a bug of V1R5 ?)

 

My configuration :

DraftSight V1R5 x64

Windows 7 64

i7 3770 - Geforce 9600GT 512Mo - DDR3 8Go

Printers : HP DesignJet T120 - Toshiba 281C - PDFCreator