Thanks sambuca and Phenigma,
For testing purpose I added with the stick removed (like before) just one dimmer close to the core. Installed the USB, passed the lock up by removing and adding again.
I did not saw any on the orbiters but I did saw on the webadmin that a light was added. I configure it and assigned to the proper room and it is responding fast and stable.
So, I'm not removing that USB ever again from the core. I ordered the minimote as Phenigma suggested, so Ill take some time to get here, so here is my question.. How to add the node manually?
Do I go to webadmin, core devices, find zwave evice, click on send command to device, add node and leave all blank, but will the usb stick reach a switch that is far away?, I don't think that it will happen. So how do I know the port/channel number of the other devices I want to add?
when the lockup happens, try to unplug and replug the usb dongle - that is the simples way I have found to fix the problem once it has occured.
To prevent it from happening in the first place, a good zwave network and a powered usb hub, as phenigma also mentioned, is the key. (one or the other might do it for you - I did both and have not had any major problem since). See our zwave page for information about troubleshooting the zwave network.