YUM Repository NFS

I created a repository on NFS to update my machines without internet access, is already working with RHEL5 and RHEL6 but with RHEL7'm in trouble, follows the configuration of my repo:

RHEL 5:

[rhel-myrepo]
name=My Red Hat Enterprise Linux $releasever - $basearch
baseurl=http://rhelrepo.ymdb.com.br/repo/rhel-x86_64-server-5/
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release

[root@yspp1060 ~]# yum repolist
Loaded plugins: security
repo id repo name status
rhel-myrepo My Red Hat Enterprise Linux 5Server - x86_64 16,995
repolist: 16,995

RHEL 6:

[rhel-myrepo]
name=My Red Hat Enterprise Linux $releasever - $basearch
baseurl=http://rhelrepo.ymdb.com.br/repo/rhel-x86_64-server-6/
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release

[root@yamaha77 ~]# yum repolist
repo id repo name status
rhel-myrepo My Red Hat Enterprise Linux 6Server - x86_64 16,610
repolist: 16,610

RHEL 7:

[rhel-repo_7]
name=My Red Hat Enterprise Linux $releasever - $basearch
baseurl=http://rhelrepo.ymdb.com.br/repo/rhel-x86_64-server-7/
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release

[root@yspxx yum.repos.d]# yum repolist
Loaded plugins: product-id, search-disabled-repos, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
repo id repo name status
rhel-repo_7 My Red Hat Enterprise Linux 7Server - x86_64 0
repolist: 0

Not pulling my local repository on RHEL 7. The following structure of my repository server:

drwxr-xr-x 3 root root 4.0K May 18 2015 rhel-myrepo
drwxr-xr-x 4 root root 4.0K May 22 2015 zabbix
drwx------ 2 root root 16K May 26 2015 lost+found
-rwxrwxrwx 1 root root 213 Feb 24 14:50 myrepo6_x64.repo
-rwxrwxrwx 1 root root 213 Feb 24 14:55 myrepo5_x64.repo
-rwxrwxrwx 1 root root 213 Feb 25 11:27 myrepo7_x64.repo
drwxr-xr-x 4 root root 4.0K Feb 26 04:17 rhel-x86_64-server-6
drwxr-xr-x 4 root root 4.0K Feb 26 05:00 rhel-x86_64-server-5
drwxr-xr-x 3 root root 4.0K Feb 26 10:00 rhel-7-server-rpms
drwxr-xr-x 3 root root 4.0K Feb 26 10:04 rhel-x86_64-server-7

What could be happening?