Rekordbox freezing whith CDJ`S & XDJ-RX

Hi, i have a problem with my rekordbox let me explain that:

I always use the software with LAN conecction to CDJ`S on my work (Club), i like to use the search mode in the software (Rekordbox) on my laptop, and move me with the trackpad of the laptop, but next of 1 hour of use (a lot of times i have that problem) when i try to click on some one playlist label, the rekordbox freezing, and also freezing the CDJ (Send a ¡WAIT! message on the CDJ Screen) when this thing happen, i have to turn off the CDJ , start again and use a UBS stick to keep playing music, because i have to force quit the rekordbox in my Macbook Pro. This problem happened also with my new XDJ-RX. That thing was happened with the rekordbox 3. all updates, also with the new Rekordbox 4. all updates.

I want to know, if I used the rekordbox on wrong way? of course, I also was used the search and roll search on the screen of the CDJ'S and XDJ-RX and do not have problem, but is more easy for me sometimes searching tracks direct on the Reckordbox on my laptop. I now, the rekordbox its a software to prepare the music (playlist,hot cue, lopps etc), but they offer the option to search , drag the tracks direct on the CDJ`S also on the RX.

Somebody can help me please?