Some times we see this error when we launch iTest application from RHEL5 for the first time. One of the reason is the SELinux configured in such a way that it will block the access.
To overcome the issue, we need to change the SELinux setting as follows:
Temporarily switch off enforcement (SELinux)
#echo 0 > /selinux/enforce
Or If you want to make it permanently, then:
Edit /etc/selinux/config file, just change SELINUX=enforcing to SELINUX=permissive.