rlog executing every second

I can't seem to get TeamCity to work with any branches in our CVS repository.  It works fine with HEAD but if I try a branch TeamCity just keeps execute rlog over and over again like so:
[2009-10-12 13:30:59,169]  DEBUG [  Cached pool 3] -      jetbrains.buildServer.VCS - Executing command with parameters: [pimp-full-root]
[2009-10-12 13:30:59,169]  DEBUG [  Cached pool 3] -      jetbrains.buildServer.VCS - Executing command: rlog
-S -d 2009/10/12 17:04:27 +0000<2009/10/12 17:04:48 +0000 -rRB_4_5_1 pimp-full-root  
[2009-10-12 13:30:59,591]  DEBUG [  Cached pool 3] -      jetbrains.buildServer.VCS - Executing command: null
[2009-10-12 13:30:59,810]  DEBUG [  Cached pool 3] -      jetbrains.buildServer.VCS - Executing command with parameters: [pimp-full-root]
[2009-10-12 13:30:59,810]  DEBUG [  Cached pool 3] -      jetbrains.buildServer.VCS - Executing command: rlog
-S -d 2009/10/12 17:04:27 +0000<2009/10/12 17:04:48 +0000 -rRB_4_5_1 pimp-full-root

No errors are reports but nothing is detected as being changed in our CVS repository.

This is the vcs configuration I have:

<?xml version="1.0" encoding="UTF-8"?>
<vcs-roots modification-check-interval="60" quiet-period="60">
  <vcs-root id="1" name="CVS - PTI0009 - PTIMP" type="cvs">
    <scope level="global" />
    <param name="cvs-branch-name" value="RB_4_5_1" />
    <param name="cvs-quiet-period" value="3" />
    <param name="cvs-root" value=":ssh:build@pti0009:/var/cvs/repos" />
    <param name="cvs-tag-mode" value="BRANCH" />
    <param name="local-server-command" value="server" />
    <param name="module-name" value="pimp-full-root" />
    <param name="ssh-path-to-ppk" value="E:\TeamCity\ssh\id_build_dsa" />
    <param name="ssh-port" value="22" />
    <param name="ssh-use-ppk" value="true" />
  </vcs-root>
</vcs-roots>

Anyone know why TeamCity is doing this?