First time with mesa - no ping but blinking user led on card

Hello everyone, i m a brand new user of Linux cnc (mach3 user - i quitted due to too much bugs and wrong reliability of the software)
i ordered a mesa 7i96s card and installed linuxcnc on a computer. 
i m quite disapointed because the first step of setting a connection doesn't work.
i set the manuel ipv4 ip adress to 10.10.10.11 (or 1 or 100) and ping 10.10.10.10 always give me no connection to the board. I tried to play with jumper position, without success (down down / down up for eeprom). Strange thing : the user led on mesa board are blinking in a additive pattern when sending packets, then stop moving when cancel ping on pc, so the communication exist ?
Is there a firmware issue of some sort ? The card is new from eusurplus.
Sorry if my question is silly.