yum yum yum groups??

[Henk Breimer]

Sometimes..
trying to compose a kickstart list
Where is gkrellm?
[net at pietro ~]$ yum list-groups gkrellm
Loaded plugins: filter-data, list-data, priorities, refresh-packagekit
==================== Installed Packages ====================
System Tools      1 (100%)
list-groups done

OK, simple
Here comes the grouplist
[[net at pietro ~]$ yum groupinfo "Sytem Tools"
Loaded plugins: filter-data, list-data, priorities, refresh-packagekit
Setting up Group Process
Warning: Group Sytem Tools does not exist.

But
[net at pietro ~]$ yum grouplist |grep ystem
   System Tools
   X Window System
   System Tools (RPM Fusion Free)

Parts of yum don't speak to each other?

I am missing something, but what?
Thanks for some light
 Henk