cannot run demos

Hi,

I have successfully configured and installed crystalspace(1.0.1) on my Fedora Core 5 system which has gcc version 4.1.0 and has got an nvidia Geforce2 MX video card.After a long wait,I finally got relief from all those compilation outputs on my terminal and come to the point of running it for the first time.But sadly,when I tried to run "./walktest -relight" I got something like this:
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DLERROR (/home/dim/crystalspace-src-1.0.1/vfs.so): /home/dim/crystalspace-src-1.0.1/vfs.so: cannot restore segment prot after reloc: Permission denied
SCF_WARNING: factory returned a null instance for crystalspace.kernel.vfs
if error messages are not self explanatory, recompile CS with CS_DEBUG
* This likely means that the plugins could not be found.
If you're a user: Check the working directory the application starts from -
usually, it is the same as the directory with the executable.
If in doubt, contact the vendor.
If you're a developer: Check if the CRYSTAL environment var points to the
correct location - usually the directory CS was built in.
WARNING: could not load plugin 'crystalspace.kernel.vfs'
Failed to initialize config!
(A common cause is the CRYSTAL environment variable not being set correctly.)
Error initializing system!
Cleaning up...
Error saving configuration '/config/walktest.cfg'.
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Even when I set the CRYSTAL var correctly(export CRYSTAL="home/dim/crystalspace-src-1.0.1")where /home/dim is my home directory,it doesn't work at all ,giving the same error message again.
Please HELP me!!!

Bye