Actual Status of the Java Web application does not correspond to the status described

Hi,
When I installed .war file on parallels plesk server , I got message "Actual Status of the Java Web application does not correspond to the status described in the database" with an exclamation marked against application. But after switching off/on the tomcat server it worked fine and I could browse on web. After just one day, it showed again such message and not working. switching off/on tomcat doesn't affect at all. Please help me if any body has faced this problem and solved. I use jdk version 1.6.0_06 and Netbeans6.9 for development and building .war file.

Thanks in advance.
Chiranjibi.