I had done CCNA, MCSA Win2k3 with 3Year exp. in win,but I m not getting a good job chance.?

One thing that would help is to improve your writing skills. If you wrote your resume/cover letter like you wrote this question, then I doubt too many employers would be looking to hire you. Yes, you are in a tech field, but your professionalism and general intelligence get your foot in the door.