i couldn't uninstall livecycle es

Hi,

I want to uninstall my LCDS ES (version 2.6.1) but i can't. When I try to uninstall, i'm getting following error:

(vista business sp1, java 1.7)

java.lang.NullPointerException
     at com.zerog.ia.installer.Installer.setPreInstallActions(DashoA10*..)
     at com.zerog.ia.installer.LifeCycleManager.d(DashoA10*..)
     at com.zerog.ia.installer.LifeCycleManager.b(DashoA10*..)
     at com.zerog.ia.installer.LifeCycleManager.j(DashoA10*..)
     at com.zerog.ia.installer.LifeCycleManager.h(DashoA10*..)
     at com.zerog.ia.installer.LifeCycleManager.a(DashoA10*..)
     at com.zerog.ia.installer.Main.main(DashoA10*..)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
     at java.lang.reflect.Method.invoke(Unknown Source)
     at com.zerog.lax.LAX.launch(DashoA10*..)
     at com.zerog.lax.LAX.main(DashoA10*..)


thanx...