DJM 900 Nexus SRT Auto BPM Detection

Hello everyone .

Have several Pioneer equipment like cdj 2000 , cdj 2000 nexus 2 , DDj 1000 , DJM 800 and now i Bought (last week) a DJM 900 Nexus SRT at a very good price ;)

Everything was ok , until yesterday... the Auto BPM stoped workin and its flashing on 120 not reading the bpm...

I have it connected via USB using her soundcard in Traktor. Now here is the thing ...  if i turn the knob to phono it detects the bpm , and if i switch back to usb it starts flashing again!! If i turn the chanel selection Knob to mic or master it detects the bpm too , if i switch back to channel 1 or 2 that im using , it stars flashin g again loosing auto detection !

if i use a usb on the cdjs it works ok ! if i use a music cd it works ok too! 

If i use the cdjs has soundcard it works too

So... its using the DJM 900 Nexus SRT usb connection :/ 

any one Had this problem ?? Solved it ? Its very anoying ! Everyrhing works great except the Auto Detection :/

May i say , that i updated the firmware yesterday too ... was 1.00 and update it to 1.13 . Was it a coincidence ?? Not sure if yesterday before de update there was this issue ...

Any help ? Please 

Thanks a lot everyone