Import of an Audio Track of several parts into another C5 pr

Hi everybody,
I have a simple question creating a lot of head ace to me. I have recorded several audio parts in my Lead Vocals , as well as Backing Vocals and copied e.g the chorus three times in the project. Now I would like to import the complete tracks (Lead and Backing Vocals) into a new project. If I do select all part of a track, copy and pasts only the firft part is copied into the new project. I tried to glue all parts of a track together and rename the new track, but it does not appear in the pool.

Can somebody please help me.