[xen-tools] Can't define CentOS mirror

[Gal Buki]

Hi

I'm installing CentOS 4 with xen-tools and used 
"--mirror=http://mymirror.tld/centos" to define the mirror.

But why do I still get this output:
rpmstrap: debug: wget 
http://mirror.centos.org/centos/4/os/i386/CentOS/RPMS/basesystem-8.0-4.noarch.rpm

I tried several mirrors but it look slike the script would always get 
the packages from the same mirror statet above.

Is the ouptut false or did I do a fault with the command?

Thanks!
Gal