problem to yum install graphviz on RedHat 7

I followed steps given at to install graphviz on my RHEL 7 server:

1. Save the content from into a local file: /etc/yum.repos.d/graphviz-rhel.repo

2. Ran: "sudo yum list available 'graphviz*'" - which poped up 20 lines of graphviz package lines each noted as "graphviz-stable"

3. Ran: "sudo yum install 'graphviz*'" - which takes "forever" to proceed, basically it hang there for an hour.

Could anyone suggest what should I do at this point?

Thank you,

yum install - Error downloading packages

The "silent" yum problem was solved.

Now when I try - "sudo yum install 'graphviz*'"
it pops out multiple "Error" lines and suggest "You could try using --skip-broken to work around the problem", which I did ... now it proceeded but end up with:

Error downloading packages:
  gts-0.7.6-21.20111025.el7.x86_64: [Errno 256] No more mirrors to try.

I tried "yum --enablerepo=graphviz-stable clean metadata" and repeated the steps and got the same results.

Any advice please?


re: yum install - Error downloading packages

GTS is available on .. not sure why yum doesn't know that ...