when i use backup command the error like this.If your Centos 6 is 64-bit and license valid, you should be able to still login.
Otherwise you should be able to create backups via commandline (login via SSH as root).
Check this:
Where we can get it?Install CentOS6 64bit binaries there, as you seem to be running newer OS binary now.
Where we can get it?
I can't seem to find them