Error when building Indentity Sserver with Maven

Hi all, I downloaded the Source Distribution version 1.5 for Identity Server and build it with Maven 2.2 When I run mvn clean install. There is an error: "Parse error reading POM. Reason: Unrecognised association: 'excludeTransitive' (position: START_TAG seen ...<exclusions>\n\t    \t<excludeTransitive>... @107:26)  for project unknown at D:\hailh\OpenID\wso2-src\modules\admin-ui\pom.xml" (The full detail of the error is at the end) And in modules\admin-ui\pom.xml there is a pieces of code: <dependency>             <groupId>org.wso2.commons.usermanager</groupId>             <artifactId>user-verification</artifactId>         <version>${usermanager.version}</version>         <exclusions>             <excludeTransitive>true</excludeTransitive>         </exclusions> </dependency> I think that <excludeTransitive>true</excludeTransitive> is not a valid Maven syntax. And that causes error. Is there any suggestion for fixing this error? Thank you in advance Laussane =============================== Full detail of error: [INFO] Scanning for projects... [INFO] ------------------------------------------------------------------------ [ERROR] FATAL ERROR [INFO] ------------------------------------------------------------------------ [INFO] Error building POM (may not be this project's POM). Project ID: unknown POM Location: D:\hailh\OpenID\wso2-src\modules\admin-ui\pom.xml Reason: Parse error reading POM. Reason: Unrecognised association: 'excludeTransitive' (position: START_TAG seen ...<exclusions>\n\t    \t<excludeTransitive>... @107:26)  for project unknown at D:\hailh\OpenID\wso2-src\modules\admin-ui\pom.xml [INFO] ------------------------------------------------------------------------ [INFO] Trace org.apache.maven.reactor.MavenExecutionException: Parse error reading POM. Reason: Unrecognised association: 'excludeTransitive' (position: START_TAG seen ...<exclusions>\n\t    \t<excludeTransitive>... @107:26)  for project unknown at D:\hailh\OpenID\wso2-src\modules\admin-ui\pom.xml     at org.apache.maven.DefaultMaven.getProjects(DefaultMaven.java:432)     at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:300)     at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:137)     at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)     at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:41)     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)     at java.lang.reflect.Method.invoke(Method.java:597)     at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)     at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)     at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)     at org.codehaus.classworlds.Launcher.main(Launcher.java:375) Caused by: org.apache.maven.project.InvalidProjectModelException: Parse error reading POM. Reason: Unrecognised association: 'excludeTransitive' (position: START_TAG seen ...<exclusions>\n\t    \t<excludeTransitive>... @107:26)  for project unknown at D:\hailh\OpenID\wso2-src\modules\admin-ui\pom.xml     at org.apache.maven.project.DefaultMavenProjectBuilder.readModel(DefaultMavenProjectBuilder.java:1610)     at org.apache.maven.project.DefaultMavenProjectBuilder.readModel(DefaultMavenProjectBuilder.java:1571)     at org.apache.maven.project.DefaultMavenProjectBuilder.buildFromSourceFileInternal(DefaultMavenProjectBuilder.java:506)     at org.apache.maven.project.DefaultMavenProjectBuilder.build(DefaultMavenProjectBuilder.java:200)     at org.apache.maven.DefaultMaven.getProject(DefaultMaven.java:632)     at org.apache.maven.DefaultMaven.collectProjects(DefaultMaven.java:515)     at org.apache.maven.DefaultMaven.collectProjects(DefaultMaven.java:588)     at org.apache.maven.DefaultMaven.getProjects(DefaultMaven.java:419)     ... 12 more Caused by: org.codehaus.plexus.util.xml.pull.XmlPullParserException: Unrecognised association: 'excludeTransitive' (position: START_TAG seen ...<exclusions>\n\t    \t<excludeTransitive>... @107:26)     at org.apache.maven.model.io.xpp3.MavenXpp3Reader.parseDependency(MavenXpp3Reader.java:1208)     at org.apache.maven.model.io.xpp3.MavenXpp3Reader.parseModel(MavenXpp3Reader.java:2094)     at org.apache.maven.model.io.xpp3.MavenXpp3Reader.read(MavenXpp3Reader.java:3912)     at org.apache.maven.project.DefaultMavenProjectBuilder.readModel(DefaultMavenProjectBuilder.java:1606)     ... 19 more [INFO] ------------------------------------------------------------------------ [INFO] Total time: < 1 second [INFO] Finished at: Fri Jul 03 12:12:49 CEST 2009 [INFO] Final Memory: 1M/4M [INFO] ------------------------------------------------------------------------