[Centos] Removing older kernel packages

Hello,

I have problems removing older kernels from my Centos machines using yum. Can somebody tell me how to remove specific versions ?

[root@web2 root]# rpm -qa | grep kernel-2 kernel-2.4.21-15.EL.c0 kernel-2.4.21-9.0.1.EL.c0 kernel-2.4.21-9.0.3.EL.c0

Is what I have installed....

And

[root@web2 root]# yum remove kernel-2.4.21-9.0.1.EL.c0 Gathering header information file(s) from server(s) Server: CentOS-3.1 - Addons Server: CentOS-3.1 - Base Server: CentOS-3.1 - Extras Server: CentOS-3.1 - Updates Finding updated packages Downloading needed headers Erase: No matches for kernel-2.4.21-9.0.1.EL.c0 No actions to take

is what I get.

Thanks,

Taco