R6034 error - RMagick

Hi all,

I am using RMagick in an application to upload photos. I have installed
ImageMagick and RMagick gem ok. But when I try to upload a photo, I get
the following error (pop-up):

Runtime Error!
Program: c:\ruby\bin\ruby.exe

R6034

An application has made an attempt to load the C runtime library
incorrectly.

I am running this on Vista. Is there any known bugs with Vista and
RMagick?

Thanks in advance

Steve.