If you cannot get the OTA update flash DL09 via Odin.
[How to] Flash Full package DL09 and Stock DI01 via Odin
It will wipe everything so backup accordingly.
After the install you'll need to root again and flash CWM. There's a new version of CWM in a sticky HERE that installs with a DJ05/DL09 kernel as opposed to the old one that had a DI01 kernel that would need to be replaced after the install.
[How to] Flash Full package DL09 and Stock DI01 via Odin
It will wipe everything so backup accordingly.
After the install you'll need to root again and flash CWM. There's a new version of CWM in a sticky HERE that installs with a DJ05/DL09 kernel as opposed to the old one that had a DI01 kernel that would need to be replaced after the install.