nobody can tell you anything without proper system info, version info for AE or details about your project.
How long is your video? Usually the tracker is used on short videos. The analyzing in background banner should disappear once it finishes analyzing, but that can take a while depending on the codec of the video, the length of the video, and the power of your machine. As Mylenium says, we don't have nearly enough info to offer any suggestions.
I'm very sorry ... i didn't know what I have done ..... I'm sorry .I asked a question in Abuse report , i'm very sorry , i didn't know...
What is the duration of the video?
You can turn off the warning banner, by going into effects control and under 3D Camera Tracker select Advanced and check hide warning banner.
In order to make sure that the analyzing banner goes away, please try to select small area in the Composition and try to change the show track point option from 3D Solved to 2D Source.
This helped Arjun, cheers, I found I had a warp effect on in the effect panel (must have done this by accident) on deleting it the banner disappeared I guess I had basically added an effect but not set any of the parameters.
Interesting. I knew what they were talking about without knowing any of those things. Perhaps ask a question, or offer something useful rather than just picking on them.