WiFi connection problem (iPhone to TP-Link router)

I'm having trouble connecting 2 iPhones 6 and one iPhone 5 to a TP-Link TD-W8901N wireless router.

When I click on the Join button on the iPhone it tries to join (upper side of pic) and then it stops (down). It's like a circle and repeats over and over....

I am able to join via Wifi with my laptop.

I can connect to another router with my iPhone.....

I did restart router several times.

Router settings:

• Channel: 1, 6, 11, auto (have been tried)
• Wireless Mode: 802.11 b+g+n
• Channel bandwidth: 20/40 MHz
• Authentication Type: WPA-PSK/WPA2-PSK
• Encryption: TKIP/AES
• Transmit Power: High
• Beacon Interval (ms): 100
• RTS/CTS Threshold: 2347
• Fragmentation Threshold (bytes): 2346
• DTIM (ms):1

I had the exact same issue with a tplink access point and this made me crazy. Nothing worked for me, until i found the solution:

Disable WMM in the wireless advanced settings!!!