Unable to start AS7

!ENTRY org.eclipse.debug.ui 4 0 2011-10-07 18:44:30.796
!MESSAGE Tab group extension: org.eclipse.jdt.debug.ui.launchConfigurationTabGroup.remoteJavaApplication for type org.eclipse.jdt.launching.remoteJavaApplication for the * mode has been replaced by extension: org.jboss.tools.common.jdt.debug.ui.launching.launchConfigurationTabGroup.JBossRemoteJavaApplication2

!ENTRY org.eclipse.core.jobs 4 2 2011-10-07 18:44:30.828
!MESSAGE An internal error occurred during: "Starting JBoss 7.0 Runtime Server".
!STACK 0
java.lang.IllegalArgumentException: classToLaunch cannot be null
	at org.eclipse.jdt.launching.VMRunnerConfiguration.<init>(VMRunnerConfiguration.java:49)
	at org.jboss.ide.eclipse.as.core.server.internal.launch.AbstractJBossStartLaunchConfiguration.actualLaunch(AbstractJBossStartLaunchConfiguration.java:177)
	at org.jboss.ide.eclipse.as.core.server.internal.launch.LocalJBossStartLaunchDelegate.actualLaunch(LocalJBossStartLaunchDelegate.java:53)
	at org.jboss.ide.eclipse.as.core.server.internal.launch.DelegatingStartLaunchConfiguration.actualLaunch(DelegatingStartLaunchConfiguration.java:56)
	at org.jboss.ide.eclipse.as.core.server.internal.launch.AbstractJBossStartLaunchConfiguration.launch(AbstractJBossStartLaunchConfiguration.java:138)
	at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:854)
	at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:703)
	at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:696)
	at org.eclipse.wst.server.core.internal.Server.startImpl2(Server.java:3402)
	at org.eclipse.wst.server.core.internal.Server.startImpl(Server.java:3340)
	at org.eclipse.wst.server.core.internal.Server$StartJob.run(Server.java:363)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)