Hi,
When i tried to attach the back up file to the test server, i am getting an error that ARCHIVER LOG required. While importing, in between it came and the import process it got hanged. After that i tried to shut it down the database. But it is not shutting down. can you please help me to solve this problem?

"But it is not shutting down. can you please help me to solve this problem?"

1 - shutdown abort
2 - restart
3 - shutdown
4 - go into archivelog mode:

http://www.dba-oracle.com/bk_disable_archive_log_mode.htm