Click anywhere in the timeline to select it, then go to the menu Sequence > Sequence Settings and post a screen shot of the Sequence Settings you are using.
Your sequence is set to a pixel dimension of 1632 x 1224, which matches neither of the source elements you listed. Is this what you want to do? It is a very non-standard size sequence, and the aspect ratio (almost square) does not match either of the source elements you listed.
Uncheck Composite in Linear Color.
Select all the clips on the timeline and once selected, go to Sequence > Render Selection. Is your playback improved?
I am sorry for the late response.
Well you were extremely helpful and I tweaked on the settings and it works perfectly fine. Actually I just started out on Premiere pro and I was into tutorials using sample files and I did not do any setting set up. When I thought that I was good enough to go I ventured out in putting some clips together and that is when I hit a roadblock.
I thank you very much for being so helpful. Well my name is Joseph and from India.
Here is my mail id and in case you want to send in any mail you are most welcome.
[personal info deleted, forum policy]