[Libvir] Problem in configuring libvirt (Xen store library not found)

Hello, First of all I am a newbie to linux. I installed Red hat enterprise 5 beta 2 which has xen. So in order to start xen I had to install libvirt as it is needed by virt-install command. But I am getting an error while configuring libvirt software. The error is "Xen store library not found". I am getting this error after a check for library containing xs_read failed. So how can I configure and install libvirt now. Please let me know the solution for this ASAP. Also, if I am doing anything wrong, please let me know. Thanks in advance Aditya