I recently purchased an Intel(R) Centrino(R) Advanced-N 6235 wireless card for my Dell XPS 8500 desktop running Windows 7. I have it installed including the latest driver, version 15.7.0.3. I have a Netgear WNDR3700v3 wireless router with the latest firmware installed. I have two SSIDs set up, one for 2.4GHz and one for 5GHz. Both SSIDs have different names. Most of the time I am having trouble connecting to the 5GHz SSID. I can see the SSID listed under available networks. It usually has 3-5 bars for signal. I try connecting but I get the message that Windows can't connect to this network. Usually after trying to connect several times I can finally connect. Once connected the speed is great on the 5GHz network and it functions normally without any further connection issues. I usually fail connecting at least 5-10 times before it finally connects. If it doesn't connected to the 5GHz network it connects me to the 2.4GHz network which works fine. There is no issues connecting to the 2.4GHz network. I have a Dell XPS 14z laptop with an Intel(R) Centrino(R) Advanced-N 6230 card and it connects to the 5GHz SSID fine which leads me to believe it is a setting on my card or computer, not my router. I have matched up the settings on both cards but this did not make a difference. I have listed the card settings below. The 5GHz SSID is using WPA2-PSK [AES} security on channel 157. I have tried switching channels from 149-161 but this did not make a difference. The 5GHz SSID is the preferred network on my computer and is at the top of the wireless network list.
I am not sure what else to try. Any help would be appreciated. Thank you.
802.11n Channel Width for band 2.4: 20MHz Only
802.11n Channel Width for band 5.2: Auto
802.11n Mode: Enabled
Ad Hoc Channel 802.11b/g: 1
Ad Hoc QoS Mode: WMM Disabled
Bluetooth(R) AMP: Enabled
Fat Channel Intolerant: Disabled
Mixed Mode Protection: CTS-to-self Enabled
Preferred Band: No Preference
Roaming Aggressiveness: Medium
Transmit Power: Highest
Wireless Mode: 802.11a/b/g