There is nothing special about the Ateme Tital Live connector, so it should be possible to add these elements into the redundancy group. One interesting point to know would be if we are talking about the main element or one of the linked DVEs of the Titan Live element

It's possible depending on the DMA version you are running that you need to reconnect your cube if your elements were just created before they become available in the list.

If they are still not there, i would assume this is an issue with the element cache, a DMA restart would very likely solve this, if this is happening regularly or even a DMA restart doesn't solve this, you can request a further investigation by sending a mail to techsupport@skyline.be