If you receive any errors when trying to redeem the UltraViolet code, please make sure you've typed in the code correctly.
If you're still having issues, please contact the studio who issued the code with the Blu-ray Disc. You can find the available studios below:
Warner Bros: http://support.ultraviolet.flixster.com/ics/support/default.asp?deptID=15266&task=knowledge&folderID=148
Sony: (800) 860-2878 consumer@SPHECustomerSupport.sony.com
Fox: https://foxuv.com/support (888) 223-4369
UVsupport@foxcustomercare.com Paramount: http://www.paramountdigitalcopy.com/support/contact.html