SQL node not sync after down and up (no replies)

Hi all,
I'm new to mysql cluster.
I've set:
1 mngm node,
2 data nodes
2 sql nodes.

I've tried the scenario in which one of the 2 sql nodes goes down and, with one only sql node, I've created a new db on the active sql node.
When I "rejoined" other sql node I've noticed that the new DB not exist on the rejoined sql node.
How can I fix this?

Thanks for the explainations,
Davide