Installed applications disappear!

[shell Johnson]

I'm new. After I deploymented a sample Helloworld EAR to websphere 5.0, I found from Administrator console that all shipped samples including Helloworld disappeared from console. An application installed earlier on the other server disappeared from console as well. All the samples code, xml files seem intact and in the installed application directory. I use "listModule" command they don't show up. Is there any way I can restore them back without reinstallation?

[Reed Peters]

I have encountered this problem several times! Please someone is there a way to recover the list of applications without rebuilding the entire server? HELP!!!