thank you for your reply
the firmware is 3.0.0.4.378.4980.
i tried factory defaults after loading - no help
i tried old, and new SSID's , tried to forget and re-configure the devices, tried with several encryptions settings ( wpa, wp2, none etc.. )
my password is only letters , capital and regular.. but only letters. so is my SSID
the weirdest thing i saw is when the b/g Protection checked ON, it can connect to the SSID
if it dosn't , i can't even connect to the SSID
this is very strange.
this is with E4200 router : ( connected it for the test )
Pinging 10.0.0.100 with 32 bytes of data:
Reply from 10.0.0.100: bytes=32 time=6ms TTL=255
Reply from 10.0.0.100: bytes=32 time=2ms TTL=255
Reply from 10.0.0.100: bytes=32 time=2ms TTL=255
Reply from 10.0.0.100: bytes=32 time=36ms TTL=255
Reply from 10.0.0.100: bytes=32 time=2ms TTL=255
Reply from 10.0.0.100: bytes=32 time=2ms TTL=255
Reply from 10.0.0.100: bytes=32 time=3ms TTL=255
Reply from 10.0.0.100: bytes=32 time=14ms TTL=255
Reply from 10.0.0.100: bytes=32 time=2ms TTL=255
Reply from 10.0.0.100: bytes=32 time=95ms TTL=255
Reply from 10.0.0.100: bytes=32 time=2ms TTL=255
Reply from 10.0.0.100: bytes=32 time=12ms TTL=255
Reply from 10.0.0.100: bytes=32 time=2ms TTL=255
Reply from 10.0.0.100: bytes=32 time=2ms TTL=255
Reply from 10.0.0.100: bytes=32 time=1ms TTL=255
Reply from 10.0.0.100: bytes=32 time=4ms TTL=255
Reply from 10.0.0.100: bytes=32 time=1ms TTL=255
this is with RT-AC3200:
Reply from 10.0.0.100: bytes=32 time=6ms TTL=255
Request timed out.
Request timed out.
Request timed out.
Reply from 10.0.0.100: bytes=32 time=4ms TTL=255
Reply from 10.0.0.100: bytes=32 time=14ms TTL=255
Request timed out.
Request timed out.
Reply from 10.0.0.100: bytes=32 time=4ms TTL=255
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Reply from 10.0.0.100: bytes=32 time=8ms TTL=255
Request timed out.
Reply from 10.0.0.100: bytes=32 time=26ms TTL=255
Request timed out.