Is IE8 supported by Canoo Webtest: R_1812?

Hello everyone, I'm trying to use the installTest.xml that was provided
with the WebTest build R_1812 and needed to change the browser to the
version I have installed (this is on a W7 box if that matters).

In the installTest.xml, I have these configs defined:
            <config
                host="vmware4-2"
                port="8080"
                basepath="/"
browser="IE8"
                haltonfailure="true"
                protocol="http"/>

But in running the test, I get this error(java.lang.NoSuchFieldError:
INTERNET_EXPLORER_8).  I also tried specifying the value as
InternetExplorer8 per the canoo website but got the same error.  I realize
this is really htmlunit running underneath but wonder why it's not working?

Thanks in advance.

c:\Webtest\myWebTestProject\tests>webtest -f installtest.xml
"C:\Program Files\Java\jdk1.6.0_26\bin\java.exe" -Xms64M -Xmx256M -cp
"C:\Users\enguyen\WebTest\bin\..\lib\ant-launcher-
1.7.0.jar" -Dant.library.dir="C:\Users\enguyen\WebTest\bin\..\lib"
"-Dlog4j.configuration=file:/C:\Users\enguyen\WebTest
\bin\..\lib/log4j.properties" org.apache.tools.ant.launch.Launcher
-nouserlib -lib "C:\Users\enguyen\WebTest\bin\..\lib\
build;C:\Users\enguyen\WebTest\bin\..\lib\build\clover.jar" -f
installtest.xml
Buildfile: installtest.xml

checkANT:

mayPrintANTError:

wt.init:

wt.defineTasks.init:

~wt.defineTasks.defineClasspath:

wt.defineTasks:

checkWebTest:
     [echo] webtest.home is c:\Webtest\myWebTestProject\tests\..\..
  [webtest]  INFO (com.canoo.webtest.ant.WebtestTask) - Starting webtest
"check calling and parsing a local file" (c:\We
btest\myWebTestProject\tests\installtest.xml:10: )
  [webtest]  INFO (com.canoo.webtest.ant.WebtestTask) - Canoo Webtest:
R_1812.
   [config]  INFO (com.canoo.webtest.engine.Configuration) - Using
haltonerror from project property wt.config.haltonerr
or: false
   [config]  INFO (com.canoo.webtest.engine.Configuration) - Using
resultpath from project property wt.config.resultpath
: c:\Webtest\myWebTestProject\tests\results
   [config]  INFO (com.canoo.webtest.engine.Configuration) - Using
saveresponse from project property wt.config.saveresp
onse: true
   [config]  INFO (com.canoo.webtest.engine.Configuration) - Creating
result directory: c:\Webtest\myWebTestProject\test
s\results\013_CheckCallingAndParsingALocalFile

BUILD FAILED
c:\Webtest\myWebTestProject\tests\installtest.xml:17:
java.lang.NoSuchFieldError: INTERNET_EXPLORER_8

Total time: 1 second