Cannot play track Error Freeze

Hey Guys,

i got the Error messenge "cannot play Track issuses E-8xxx" (i dont know which number) after changing the Track, if i changing again the Track then

i got a endless popup messenge with Now Loading ... Freeezeee ... only a completly restart helps ...

the music are analyse with RB 2.2.3 and RB 3.0 with different SD-Cards ... both CDj 2000 Nexus on the FW 1.22 ... my mp3s are checked with the programm mp3val-0.1.8 its all ok ... no problems ...

Set-up

2x CDJ 2000 Nexus

1x DJM 900 Nexus

connected with Netgear (5port)

different SD-Cards / USB-Sticks ...

Notebook :

Win 7 64bit

RB 2.2.3 / 3.0

I7 4500u / 8gb ram

I dont know, whats wrong ...