When Uninstall a Flow, the operation is successful, but the button icon is still "Uninstall"

Version.properties Content:
org.opendaylight.controller.version = 0.1
org.opendaylight.controller.build.scm.version = 923d6b33391ace11b42e36a7f2d08cabe241a4f3
org.opendaylight.controller.build.user = jenkins-controller
org.opendaylight.controller.build.workspace = **********
org.opendaylight.controller.build.timestamp = 1386533883004
org.opendaylight.controller.build.machine = **********

Controller OS:Redhat 6.2
Web Browser OS:Win7 32bit
OpenFlow Network:mininet-2.1.0-130919-ubuntu-13.04-server-i386-ovf

Precondition:
One Flow has been saved and installed.

Problem Description:
UI Position is Tab page "Flows",right,below the topology,under "Flow Overview"
When you click the button whose icon text is "Uninstall Flow" to uninstall the flow, you will find the operation has succeed but the button icon text is still "Uninstall Flow".In my case, I use h1 ping h2, the flow's function is to stop the link. When I click "Uninstall Flow" button first, h1 can ping h2. Hence I say it succeed. Then I click "Uninstall Flow" second time, button icon text change to "Install Flow" and the flow is still uninstall status which is normal. In that way, h1 can ping h2.

PS.Maybe I will fix it, when I do some more job.