I am having the same EXACT issue as described in another forum (which happened to be closed either yesterday or today)
https://www-secure.symantec.com/connect/forums/unable-create-deploy-image-task
When trying to create a "Deploy Image Task", I can fill in all relevant information, such as the image name, product key, etc. but when I click ok to actually create the task, I get the error message "The data could not be loaded."
After which, I've tried putting the deploy image task in a job and running it, but the image doesn't work on the client machine. It just reboots in a BSOD (blue screen of death) loop.
Has anyone come up with a solution to this problem yet? I currently have a call into Symantec's Tech Support, and has been escalated to an "advanced engineer". I'm running Altiris 7.1 Deployment Solution, Windows 2008 R2 server.