Hi Divya,
Follow this -
Type this in SQL query console
1) use {ur DB name}---> Open BP and check configure connection and there u can find the name of DB connection.
2)UPDATE BPAPassword SET salt='bWBTNqWrvq6RbQnns5PpF+Kt7V1gVS97F6R5iZIxV6M=',hash='9XkueyLzhbhRUMoKedsN3l7ChDmfS811IDymP8ZCEv8='
WHERE userid=(SELECT userid FROM BPAUser WHERE username='admin') AND active=1;
This will reset the password to admin