Activity is not showing up in DTR

Hi ,

I've checked out few Java files in DC by creating the activity and did some coding in it. I didnt check IN the code for a day. Next day my system crashed out and i had installed the NWDS and connected to DTR again and imported the configuration. The Activity that i have created before the crash is not showing up in the development configuration perspective. All the files that i had checked out before the crash are now in Writable mode but i when i try to edit and save the file it shows "<b>Save could not be completed , Files are not checked our for edit</b>". How to find the pending activity in my name in DTR and check in that activity

Thanks,

Saravanan