Some years ago the old TurboPower LockBox 2 component has been maintained in a way that it is not backward compatible. That’s why it got the new version number 3.
If you have old code that uses LockBox 2 and should be moved to XE6 you have a problem. LockBox 3 is completely different to LockBox 2. You have to change your code or you need a LockBox 2 version for XE6.
That’s what happened to me this week. And Now I have a XE6 compatible version of LockBox 2. If someone is interested then send me an email and I will publish it.