Problem with xwiki compilation in Eclipse

Hello, Although I already run Xwiki a couple of times in Eclipse, the last version of sources that I got throws me the following error when I try to run it as standalone: Buildfile: D:\XWiki\src\xwiki\build.xml BUILD FAILED D:\XWiki\src\xwiki\build.xml:227: taskdef A class needed by class org.apache.cactus.integration.ant.CactusTask cannot be found: junit/framework/Test Total time: 844 milliseconds Can someone help me understand? I think a class is missing from the junit jar but....what should I do? Thank you, Evelina Slatineanu