[Yum] How to exclude

[Dirk Ouellette]

# yum update
Gathering header information file(s) from server(s)
Server: Fedora Core 1 - i386 - Base
Server: Dag RPM Repository for Fedora Core
Finding updated packages
Downloading needed headers
Resolving dependencies
......Unable to satisfy dependencies
Package perl-Tk needs perl(Tk::LabRadio), this is not available.
Package perl-Tk needs perl(Tk::TextReindex), this is not available.
[root at localhost booda]# yum update exclude perl-Tk
Gathering header information file(s) from server(s)
Server: Fedora Core 1 - i386 - Base
Server: Dag RPM Repository for Fedora Core
Finding updated packages
Downloading needed headers
Cannot find any package matching exclude available to be updated.
Resolving dependencies
....Unable to satisfy dependencies
Package perl-Tk needs perl(Tk::LabRadio), this is not available.
Package perl-Tk needs perl(Tk::TextReindex), this is not available.

How do I resolve this problem?
Thanks