Need help with Configuration of IM(6.3.2)

[Randomized]

First of all i want to let u know that im kinda new to IM.

My Problem is that i get the Error: convert: no decode delegate for this image format (.ps)
(convert *.tif *.ps -> works well || convert *.ps *.ps -> decode delegate error)

i spent some time searching for an answer in this forum but didnt find 1.

i read that i somehow can set the path for convert-rountines in my delegates.xml
do i need to update any lib files fonts etc. ?
do i need to care about any other configuration files?
do i need ghostscript for eps/ps conversion?(as a program or framework)

on my 2nd PC it is all working well but i dont know why.
but even if i convert my *.ps there with IM(convert *old.ps *new.ps)
it turns into bad quality.
If i convert it with Ghostscript (GSVIEW) i nearly get the same quality even with half DPI

my goal is to reduce the filesize of my *.ps from something like 2mb to < 500kb with the convert command of IM
i wanted to do this by changing the DPI using the resample command. now i just need the quality ghostscript offers.
i read that IM is using parts of GS?

would be cool if u could help me out

[Randomized]

i tried to change my delegates config
i set my environment variable MAGICK_CONFIGURE_PATH to my IM install path ( C:\Programme\ImageMagick-6.3.8-Q16 )
then exchanged the path gs in my delegate.xml with the ghostscript path ( C:\gs\gs8.14) for ps->eps and eps->ps

but still doesn't work yet :/

any ideas?