Installation on RHEL 6

We are trying to install EMS on RHEL 6 platform. We used the following steps to do so. We are facing an issue as explained below. We run the following commands with adminstrative privilege 1. curl http://yum.evostream.com/installkeys.sh -o /tmp/installkeys.sh. This command was running successfully in the system. 2. sh /tmp/installkeys.sh We are getting an error message as “ Unable to unzip /tmp/primary.xml.gz “. Can you please help us resolve this issue. Thanks