ORA-12154: TNS:could not resolve service name

[bacterium]

Hi,
Is there any way to solve the question :'ORA-12154: TNS:could not resolve service name' ,I import database in Oracle , but I can not logon into the database , while login through the SQL PLUS, it notes 'ORA-12154: TNS:could not resolve service name', I configured at net8s configure assistant , at the end it notes : ORA-12514: TNS:listener could not resolve SERVICE_NAME given in connect descriptor. but on the file tnsnames.ora :
KANKYO =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = caobingjun)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = KANKYO)
)
)
what should I do ,please give me some answers.Thank you very much!!!!!!

[debasisdas]

Please find the details of the error ORA-12154 here.