while publishing it is showing as incorrect password or username but i have given the correct id and password,how can i solve this ?

Just looking at the screenshot, we may not be able to predict the root cause. I would request to attach your ThingWorx Studio logs.

The credentials of your Studio portal (https://studio.thingworx.com) should be used over here. Also, to further validate the credentials, append "/ExperienceService" to the URL in the ExperienceService field and try accessing it from your browser.