MP8009GV POE+ Problem

Hello ,
for one ur Product i used MP8009GV . I used Figure 20 on Page 36 for ur Board .At first AUX did not work, then i remove R34 ( i saw here) ,then it’s ok. But POE+ (802.3at) doesn’t work at all . I tried to see in OSCI , between VDD and VSS , then it worked. I found when i Connected VSS to ETH of OSCI
then it works . I think the problem comes from Rdet , i have changed it but , same issue .
Could you pls help me ?