scribus warning

[hweber@…]

scribus warning after scribus start:

'The following programs are missing:

Ghostscript: You cannot use EPS images or PrintPreview'

but there is ghostscript:

mbp:~ hweber$ port installed | grep -i ghost

ghostscript @8.63_1 (active)

my scpecs:

MacBook Pro 15" MacBookPro1,1 Intel Core Duo Mac OS X 10.5.6 (9G55) Darwin 9.6.0

port version Version: 1.700

port info scribus scribus @1.3.3.11 (print) Variants: darwin_9, universal

thank you for helping