Unable to update Virtualmin and Webmin

I can't seem to update Virtualmin or Webmin.

[quote] Now updating usermin ..

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

  Loaded plugins: fastestmirror
  Loading mirror speeds from cached hostfile
   * extras: centos.mirror.iweb.ca
   * rpmforge: ftp-stud.fht-esslingen.de
   * base: centos.mirror.iweb.ca
   * atomic: www5.atomicorp.com
   * addons: centos.mirror.iweb.ca
   * updates: centos.mirror.iweb.ca
  Setting up Install Process
  Parsing package install arguments
  Resolving Dependencies
  --> Running transaction check
  ---> Package usermin.noarch 0:1.420-1 set to be updated
  --> Processing Dependency: /usr/libexec/usermin for package: ust-virtual-server-mobile
  --> Processing Dependency: /usr/libexec/usermin for package: ust-virtual-server-mobile
  --> Processing Dependency: /usr/libexec/usermin for package: ust-virtual-server-theme
  --> Processing Dependency: /usr/libexec/usermin for package: ust-virtual-server-theme
  --> Finished Dependency Resolution
  2:ust-virtual-server-mobile-2.1-1.noarch from installed has depsolving problems
    --> Missing Dependency: /usr/libexec/usermin is needed by package 2:ust-virtual-server-mobile-2.1-1.noarch (installed)
  2:ust-virtual-server-theme-6.9-1.noarch from installed has depsolving problems
    --> Missing Dependency: /usr/libexec/usermin is needed by package 2:ust-virtual-server-theme-6.9-1.noarch (installed)
  Error: Missing Dependency: /usr/libexec/usermin is needed by package 2:ust-virtual-server-mobile-2.1-1.noarch (installed)
  Error: Missing Dependency: /usr/libexec/usermin is needed by package 2:ust-virtual-server-theme-6.9-1.noarch (installed)

  .. install failed!

Now updating webmin ..

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

  Loaded plugins: fastestmirror
  Loading mirror speeds from cached hostfile
   * extras: centos.mirror.iweb.ca
   * rpmforge: ftp-stud.fht-esslingen.de
   * base: centos.mirror.iweb.ca
   * atomic: www5.atomicorp.com
   * addons: centos.mirror.iweb.ca
   * updates: centos.mirror.iweb.ca
  Setting up Install Process
  Parsing package install arguments
  Resolving Dependencies
  --> Running transaction check
  ---> Package webmin.noarch 0:1.490-1 set to be updated
  --> Processing Dependency: /usr/libexec/webmin for package: wbm-virtualmin-awstats
  --> Processing Dependency: /usr/libexec/webmin for package: wbm-virtualmin-svn
  --> Processing Dependency: /usr/libexec/webmin for package: wbm-virtualmin-registrar
  --> Processing Dependency: /usr/libexec/webmin for package: wbm-virtualmin-htpasswd
  --> Processing Dependency: /usr/libexec/webmin for package: wbm-php-pear
  --> Processing Dependency: /usr/libexec/webmin for package: wbm-php-pear
  --> Processing Dependency: /usr/libexec/webmin for package: wbm-virtualmin-google-analytics
  --> Processing Dependency: /usr/libexec/webmin for package: wbm-ruby-gems
  --> Processing Dependency: /usr/libexec/webmin for package: wbm-ruby-gems
  --> Processing Dependency: /usr/libexec/webmin for package: wbm-virtual-server
  --> Processing Dependency: /usr/libexec/webmin for package: wbm-virtual-server
  --> Processing Dependency: /usr/libexec/webmin for package: wbt-virtual-server-theme
  --> Processing Dependency: /usr/libexec/webmin for package: wbm-virtualmin-signup
  --> Processing Dependency: /usr/libexec/webmin for package: wbm-virtualmin-signup
  --> Processing Dependency: /usr/libexec/webmin for package: wbm-virtualmin-dav
  --> Processing Dependency: /usr/libexec/webmin for package: wbt-virtual-server-mobile
  --> Processing Dependency: /usr/libexec/webmin for package: wbm-virtualmin-mailman
  --> Processing Dependency: /usr/libexec/webmin for package: wbm-security-updates
  --> Processing Dependency: /usr/libexec/webmin for package: wbm-security-updates
  --> Processing Dependency: /usr/libexec/webmin for package: wbm-virtualmin-init
  --> Processing Dependency: /usr/libexec/webmin for package: wbm-virtualmin-init
  --> Restarting Dependency Resolution with new changes.
  --> Running transaction check
  ---> Package usermin.noarch 0:1.420-1 set to be updated
  --> Processing Dependency: /usr/libexec/usermin for package: ust-virtual-server-mobile
  --> Processing Dependency: /usr/libexec/usermin for package: ust-virtual-server-mobile
  --> Processing Dependency: /usr/libexec/usermin for package: ust-virtual-server-theme
  --> Processing Dependency: /usr/libexec/usermin for package: ust-virtual-server-theme
  --> Finished Dependency Resolution
  2:ust-virtual-server-mobile-2.1-1.noarch from installed has depsolving problems
    --> Missing Dependency: /usr/libexec/usermin is needed by package 2:ust-virtual-server-mobile-2.1-1.noarch (installed)
  2:ust-virtual-server-theme-6.9-1.noarch from installed has depsolving problems
    --> Missing Dependency: /usr/libexec/usermin is needed by package 2:ust-virtual-server-theme-6.9-1.noarch (installed)
  Error: Missing Dependency: /usr/libexec/usermin is needed by package 2:ust-virtual-server-mobile-2.1-1.noarch (installed)
  Error: Missing Dependency: /usr/libexec/usermin is needed by package 2:ust-virtual-server-theme-6.9-1.noarch (installed)

  .. install failed!

[/quote]

Those directories do exist, but webmin and vmin work perfectly, so what's the problem?