J2ee myeclipse develop error log for tomcat 7 deploy problem

Error:

An internal error occurred during: "Launching zkxmeetings on MyEclipse Tomcat 7".
Cannot change deployment state from ERROR to REDEPLOYING.

 

Fixed:

Right click Project –> MyEclipse –> Add and remove project deployments …

in deployments,i found one error icon in the myeclipse tomcat 7 row,so i selected that row,click redeploy.It said:

An internal error occurred during: "Redeploy".
Cannot change deployment state from ERROR to REDEPLOYING.

 

So i click remove.then click ok. close this window.

Then retried debug as myeclipse server application.and select the tomcat 7 plateform.it is ok now!