I have solved this problem,
why the problem is comming : i have copied the data of mysql data folder and reinstall the mysql , then again i paste the data folder files into new created data folder , but i was forget to copy
C:\Program Files\MySQL\MySQL Server 4.1\data\ibdata1
then mysql not found any entries related to old created data tables.
Solution: always copy ibdata1 file with your backup,or mysql data folder.
then when you want to paste, first goto control panel ->administrator tasks-> services->
find mysql service, and stop it. then goto mysql folder
C:\Program Files\MySQL\MySQL Server 4.1\data\
and paste "ibdata1" file.
now you start service from the control panel. and access your database with phpmyadmin or any other tool.
enjoy !
Shaikh Wasim
Developer : php/mysql
anciwasm@gmail.com
+919826320559