Encryption Decryption In Scriptlets/Java

I have this code in my scriptlet, when I use the Encryption code to encrypt my data it executes successfully, now when I get my encrypted data from my DB, specifically MSSQL.. I traced where the program stopped working and it stopped in the decryption part and I get this error.. "Given Final Block not properly padded".. can anyway help me here? Thanks in Advance.. Here's the code..

byte[] encryptKey = "This is a test DESede key".getBytes();

DESedeKeySpec spec = new DESedeKeySpec(encryptKey);

SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DESede");

SecretKey theKey = keyFactory.generateSecret(spec);

Cipher cipher = Cipher.getInstance("DESede/CBC/PKCS5Padding");

IvParameterSpec ivParameters = new IvParameterSpec(new byte[] { 12, 34, 56, 78, 90, 87, 65, 43 } );
cipher.init(Cipher.DECRYPT_MODE, theKey, ivParameters);

System.out.println("Get Encrypted Data from db");
String fName = (String)session.getAttribute("first_name");
String lName = (String)session.getAttribute("last_name");

System.out.println("Convert Encrypted Data to Byte Format");
byte[] FirstName = new byte[(int)fName.length()];
byte[] LastName = new byte[(int)lName.length()];

// Decrypt the data
System.out.println("Decrypt Byte Converted Data");
byte[] DecryptedFirstName = cipher.doFinal(FirstName);
byte[] DecryptedLastName = cipher.doFinal(LastName);