Setting up Ipdiscover

Hello,

Today i've finished installing OCS inventory, i installed a Unix/Linux agent on a server with Debian 8, the inventoring worked well, i can see the server on the web interface.

After that i tried to test Ipdiscover, and there is my problem, nothing i discovered, like there is no data, i've tested a command directly in CLI : perl ipdiscover-utils.pl -ip=192.168.250.221/255.255.255.0 -net=255.255.255.0 -a -xml -u=ocs -p=ocs -d=ocs

i got this output :

<IP>
     <DISCOVERED>no</DISCOVERED>
     <DNS>-</DNS>
     <INVENTORIED>yes</INVENTORIED>
     <IP>192.168.250.221</IP>
     <NETBIOS></NETBIOS>
     <NETNAME>Serveurs</NETNAME>
     <NETNUM>192.168.250.0</NETNUM>
     <TYPE>Computer</TYPE>
</IP>

So look like it work, but even with that there is nothing that appear on the web interface

Does someone know this issue ?

Thanks in advance.