Installing error

Hi guys,
I am trying to install redhat Linux 6 for the first time. I bought a server which has Linux previously installed. When I try to create a custom layout, I get the following error " Could not allocate requested partitions: not enough free space on disks. " How can I free the disk so I can do the installation?

Please guys, I will really appreciate your help no this.

Thanks

Cjashu

Do you want to preserve any data on the disk? If not, use a boot CD / live CD to repartition the disk. It then should be entirely at your disposal.

Without the details about the disk layout you're trying to create we cannot really provide any useful answers.

Please post the full partition table of your custom layout.