Thank you all for your help
I was able to connect and it works fine now.
After trying your solutions I discover that my NIC card was not working well...
The fact is that I tested a D-Link DFE-530TX+ and it was working well for the LAN
so I used the same card for the connection with roadrunner. this time it didn't work.
I discover that the revison was not the same
so the D-link DFE-530TX+ Rev. C1 works fine, the same with a Rev. D1 does not....
Again, Thank you all for your help