error updating

every time I try to update this is my erro i get.....

Public key for awstats-7.0-2.el5.rf.noarch.rpm is not installed

.. install failed!

Now updating clamav ..

Installing package(s) with command yum -y install clamav ..

Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: hpc.arc.georgetown.edu
 * extras: mirror.cogentco.com
 * updates: centos.mirror.choopa.net
http://cloudmin.virtualmin.com/universal/repodata/repomd.xml: [Errno 14] HTTP Error 401: Authorization Required
Trying other mirror.
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package clamav.x86_64 0:0.97.1-1.el5.rf set to be updated
--> Processing Dependency: clamav-db for package: clamav
--> Processing Dependency: clamav-lib = 0.96.5-1.vm.el5 for package: clamav-server
--> Running transaction check
---> Package clamav-db.x86_64 0:0.97.1-1.el5.rf set to be updated
--> Processing Dependency: clamav-server = 0.96.5-1.vm.el5 for package: clamav-server-sysv
---> Package clamd.x86_64 0:0.97.1-1.el5.rf set to be updated
--> Processing Conflict: clamav-filesystem conflicts clamav > 0.96.5-1.vm.el5
--> Finished Dependency Resolution
clamav-server-sysv-0.96.5-1.vm.el5.x86_64 from installed has depsolving problems
  --> Missing Dependency: clamav-server = 0.96.5-1.vm.el5 is needed by package clamav-server-sysv-0.96.5-1.vm.el5.x86_64 (installed)
clamav-filesystem-0.96.5-1.vm.el5.x86_64 from installed has depsolving problems
  --> clamav-filesystem conflicts with clamav
Error: clamav-filesystem conflicts with clamav
Error: Missing Dependency: clamav-server = 0.96.5-1.vm.el5 is needed by package clamav-server-sysv-0.96.5-1.vm.el5.x86_64 (installed)
 You could try using --skip-broken to work around the problem
 You could try running: package-cleanup --problems
                        package-cleanup --dupes
                        rpm -Va --nofiles --nodigest

.. install failed!

Any knowhow on how to fix this ?? Thanks