Figured out what happened. In each folder there is a .svn folder (may be hidden). In that folder there is a file called entries. This file contains the name of the subversion server. Since i changed my computer, the name of the subversion server changed too. So i had to edit this file to reflect the new server name. I used notepad++'s search in files tool to make bulk changes. Only tricky part is that the .svn folders are read only so i have to te,porarily uncheck that flag in explorer.
Once i changed the server name in entries, i clicked update status in dw and i get my repository back.