Encryption Decryption in SQL Server 2005

Can you make the below verification to see whether your encryption and decryption works correctly or not..

In Old Server

OPEN SYMMETRIC KEY [key_name] DECRYPTION BY CERTIFICATE key_cert;
GO
SELECT encryptbykey(key_guid('key_name'), 'TestData')
GO

In New Server

OPEN SYMMETRIC KEY [key_name] DECRYPTION BY CERTIFICATE key_cert;
GO
DECLARE @blob varbinary(8000);
SET @blob = 'output from earlier select statement'
SELECT CONVERT(varchar(8000), decryptbykey(@blob));
GO

Close symmetric keys in both servers

CLOSE SYMMETRIC KEY [key_name];
GO