Red hat developer tools

I installed Red Hat Linux Enterprise 5 but i cant be able to add developer tools with yum groupinstall 'Development Tools', can someone advice what to do.
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Seth SimmonsSr. Systems AdministratorCommented:
what error are you getting?
You need to install yum-utils first:

yum install yum-utils

yum groupinstall "Development Tools"      (in double quotes "")
Groupinstall is part of the yum command. There is no need to install yum-utils.
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ainsupportAuthor Commented:
yum groupinstall "Development Tools"

And i got:
Loaded plugins: product-id, security, subscription-manager
Updating Red Hat repositories.
Setting up Group Process
Warning: Group Development Tools does not exist.
No packages in any requested group available to install or update

Seth SimmonsSr. Systems AdministratorCommented:
if you do yum grouplist do you see that listed under available groups?
Check and make sure your repo list is enabled.

cat /etc/yum.repo.d/*repo

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Your repo list should look similar like below -
name=Red Hat Enterprise Linux $releasever - $basearch - Source

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