ant build toolkit: WorkItemPublisherTask

hi,
I want to publish work items in build result.
I am trying giving workitem file as input but it does not work.
The format in input file is work item number per line (not UUID)

I defined the task as follows:
<taskdef
name="workItemPublisher" classname="com.ibm.team.build.ant.task.WorkItemPublisherTask" />

I am calling the task as follows:

<workItemPublisher
repositoryAddress="${repositoryAddress}"
userId="${userId}"
passwordFile="${passwordFile}"
buildResultUUID="${buildResultUUID}"
inputFileType="WORKITEM"
filePath="C:\rtc\wi.txt" />

I am getting following comment in build log:
An Ant BuildException has occured: The following error occurred while executing this line:
C:\rtc\scripts\antTasks.xml:45: Class com.ibm.team.build.ant.task.WorkItemPublisherTask doesn't support the "inputfiletype" attribute.

Note: I am using link publisher task successfully at same environment as follows:

<linkPublisher
repositoryAddress="${repositoryAddress}"
userId="${userId}"
passwordFile="${passwordFile}"
buildResultUUID="${buildResultUUID}"
url="${function_list}"
label="external link" />

can you please provide an example usage? I prefer giving input parameters as string. But if not possible, I can do it with a password file.

Thank you