Problem in digimesh network synchronization

I’m using Digi XBee 865/868LP RF Modules.
I have a problem when a module has to take the network OS and OW values and use them. I’m using unicast transmission so I’m making a node discovery process to find the address of a specific device where the data are sent. Despite the fact that the node discovery completes in a successful way
the module continues to use the initial SP and ST times as his OS and OW times and it doesn’t get the networks sleep times.

That is because it never synced up with the network. You will need to increase its SP and ST times and move it within range of a rapid sync Coordinator or always on module to let it sync up first.