so im gonna give u some guide to redeem ur dlc . this using web yah . cus using ps3 or in xmb is still maintenance.

1. first go to this web http://us.playstation.com/accountsettings/ then login

2. second after u login go to account setting

3. third after that click manage account

4. fourth find redeem psn card or promotion code then click

5. fifth enter ur code

6. fula now u already redeem ur code

im sorry if im slowpoke and sorry my english 

i already tried to redeem dcuo activation code and it work

thx for reading

note : dlc or psn cannot using this now only activation code thank u