Record Box & Xdj Rx Crash!

Hi from Greece. Many days ago i was posting about a crash of my record box program here. Pioneer team said to me that my laptop isn't good enough for record box program. Its ok with that. Its in my priorities to buy a new one..

But when i'm playing through ethernet cable with my laptop, and recordbox crash (song still playing) xdj rx don't give me the option to select songs from usb sticks! I press usb to select song but also xdj rx is stuck. Of course is still playing but i guess until the end of song. Why that??? Can any one give me a solution???Is it because its connected through ethernet cable??? Isn't xdj rx stand alone mixer????