Enable rhel-workstation-rhscl-6-beta-rpms

Hi,

I tried to enable rhel-workstation-rhscl-6-beta-rpms repositoy under subscription-manager-gui, but it gives following error message when doing yum-update:

Setting up Update Process
rhel-6-workstation-optional-rpms | 3.5 kB 00:00
rhel-6-workstation-rpms | 3.7 kB 00:00
rhel-6-workstation-supplementary-rpms | 3.8 kB 00:00
rhel-workstation-dts-6-rhb-rpms | 2.8 kB 00:00
https://cdn.redhat.com/content/beta/rhel/workstation/6/6Workstation/x86_64/rhscl/1/os/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404 Not Found"
Trying other mirror.
Error: Cannot retrieve repository metadata (repomd.xml) for repository: rhel-workstation-rhscl-6-beta-rpms. Please verify its path and try again

Anything I did wrong?

Thanks,