Asus 500gx - problem na omrežju

Torej, v pritličju imam Amisov wlan modem/router Speedtouch 780WL, v prvem nadstropju pa Asus 500g deluxe kot acces point (na katerega imam komp povezan s kablom), povezana brezžično z WDS. Pogosto se mi dozdeva da mi brskanje in ostal zadeve ne delajo najhitreje oz. tekoče. Download in upload po drugi strani deluje na polno in brez problema. Pa sem malce popingal zadevo:

Amisov modem

Pinging 192.168.1.254 with 32 bytes of data:

Reply from 192.168.1.254: bytes=32 time=-100ms TTL=64
Reply from 192.168.1.254: bytes=32 time=-100ms TTL=64
Reply from 192.168.1.254: bytes=32 time=-100ms TTL=64
Reply from 192.168.1.254: bytes=32 time=1ms TTL=64

Ping statistics for 192.168.1.254:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 1ms, Maximum = -100ms, Average = 1073741749msImperij

Kako hudiča mu kaže -100? Bolj jasna stvar postane ko pingam direktno asusov router:

Pinging 192.168.1.67 with 32 bytes of data:

Reply from 192.168.1.67: bytes=32 time=2ms TTL=64
Reply from 192.168.1.67: bytes=32 time=-101ms TTL=64
Reply from 192.168.1.67: bytes=32 time=-101ms TTL=64
Reply from 192.168.1.67: bytes=32 time=-101ms TTL=64

Ping statistics for 192.168.1.67:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 2ms, Maximum = -101ms, Average = 1073741748ms

WDS torej deluje brez napake (preverjeno z drugim compom, brezzžično povezanim na acces point, problem je na žični povezavi med računalnikom in routerjem. Seveda sem zato na routerju zamenjal firmware, hard resetiral vse skupaj, skratka, poskušal vse mogoče. Trenutno imam gori Olegov firmware, bom še enkrat poskusil z uradnim, potem pa še DD-WRT. Bi bil pa vesel kakega predloga če je mel kdo podoben problem