CS1 image quality problem with rasterised PSDs

i'm encountering odd problem creaky old cs1 (windows xp).

i'm taking autocad drawing, using postscript print eps, rasterising in photoshop (elements, v5.0) @ 300dpi (with anti-aliasing on) in greyscale.

here's odd thing: if print photoshop, comes out fine. if link in indesign , print indesign document, lines go faint, or disappear completely. effect (the lost lines) can seen on screen when zooming in , out, too.

i've tried of above pdf (but that's worse). ideas?

thanks in advance.

>this effect (the lost lines) can seen on screen when zooming in , out, too.

do mean "reappear" when zoom in?
are placing psds in idcs @ 100% or reducing them?
what stroke thickness of these lines in autocad?

what device printing to? using same output line screen printing photoshop , indesign?

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