trying to use ant and RTC

I have a sample ant script to extract code from RTC

I am trying to run it from command line.

I am getting the following error.

C:\build.xml:160: taskdef A class needed by class com.ibm.team.build.ant.task.St
artBuildTask cannot be found: com/ibm/team/repository/common/TeamRepositoryExcep
tion

Earlier i got the error:

taskdef class com.ibm.team.build.ant.task.StartBuildTask cannot be found

Then i added

C:\Program Files\IBM\TeamConcertBuild\buildsystem\buildtoolkit\com.ibm.team.build.client_0.6.1.I200810082303.jar;C:\Program Files\IBM\TeamConcertBuild\buildsystem\bu
ildtoolkit\com.ibm.team.build.common_0.6.1.I200810082303.jar;C:\Program Files\IBM\TeamConcertBuild\buildsystem\buildtoolkit\com.ibm.team.build.toolkit_0.6.1.I200810082303.jar;

to get the more recent error.

I am not sure what other jars i need to get a command line Ant to work.

Any help would be greatly appreciated. Thanks.