Intel Dual Band Wireless-AC 7265 issue

Greeting All,

I am using Lenovo X250 Windows 7 Pro (32bits) with Intel Dual Band Wireless-AC 7265 wireless adapter.

I can mange to connect other wireless SSID without any problem except at home.

After i change the Wireless mode to 802.11g then i can connect my home network and internet access.

Other network devices (NB, Mobile, Tablet) are working fine at my home internet Lenovo X250.

i updated the wireless driver and even already reinstall windows but no luck.

Please give me advise for this matter.

Thanks in advance.