Deployment Exception during Start of JBoss AS (4.2.3.GA)

Dear Experts,
I have been facing problems in deploying my application in Eclipse IDE. I restared the jboss server and encountered with the error as pasted below -

INFO [TomcatDeployer] deploy, ctxPath=/jmx-console, warUrl=.../deploy/jmx-console.war/
11:16:45,406 ERROR [URLDeploymentScanner] Incomplete Deployment listing:

— Incompletely deployed packages —
org.jboss.deployment.DeploymentInfo@657088df

{ url=file:/D:/eclipse-jee-galileo-win32/eclipse/eclipse_plugin/jboss-4.2.3.GA/server/default/deploy/docmanager.war }

deployer: MBeanProxyExt[jboss.web:service=WebServer]
status: Deployment FAILED reason: URL file:/D:/eclipse-jee-galileo-win32/eclipse/eclipse_plugin/jboss-4.2.3.GA/server/default/tmp/deploy/tmp22832docmanager-exp.war/ deployment failed
state: FAILED
watch: file:/D:/eclipse-jee-galileo-win32/eclipse/eclipse_plugin/jboss-4.2.3.GA/server/default/deploy/docmanager.war
altDD: null
lastDeployed: 1285566401250
lastModified: 1285566401218
mbeans:

— MBeans waiting for other MBeans —
ObjectName: jboss.web.deployment:war=docmanager.war,id=1701873887
State: FAILED
Reason: org.jboss.deployment.DeploymentException: URL file:/D:/eclipse-jee-galileo-win32/eclipse/eclipse_plugin/jboss-4.2.3.GA/server/default/tmp/deploy/tmp22832docmanager-exp.war/ deployment failed

— MBEANS THAT ARE THE ROOT CAUSE OF THE PROBLEM —
ObjectName: jboss.web.deployment:war=docmanager.war,id=1701873887
State: FAILED
Reason: org.jboss.deployment.DeploymentException: URL file:/D:/eclipse-jee-galileo-win32/eclipse/eclipse_plugin/jboss-4.2.3.GA/server/default/tmp/deploy/tmp22832docmanager-exp.war/ deployment failed

can anyone let me know the reason why deployment gets failed?