ZBrushCentral

Zbrush model some polys disconnected?

Hi, I re-meshed part of a model using Zremesher, and it seems to have permanently separated this part from the rest of the model. It appears to be connected until i render and OBJ for Cinema 4d. Then in C4D those polys are completely disconnected (separated into poly groups in C4D) and on a separate layer. How do I make the model whole again in Zbrush? Thank you.

Can you upload a picture showing the problem?