are both of your computers using DHCP? suppose some firewall or antivirus may block the ping ...

No, I am using static ip and turn off firewall and antivirus

Having the same problem, Same Router Model


So here currently the way i setup the router and pc

TD-W8151N -> 192.168.1.1
| | | ___________________
| | |
|¯¯¯¯¯¯¯¯¯ ¯¯¯¯¯¯¯¯¯| |
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Ethernet Wireless Wireless
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PC1 PC2 Media Player (SaMBa Server and Client Support)
Windows8 Windows8
(192.168.1.2) (192.168.1.3) (192.168.1.4)
(All of them Are DHCP Enabled)

Now the problem is PC1 Cant Send & Receive Ping from PC2 and the Media Player.
it also cant access shared folder in PC2 and SMB in the Mediaplayer. but it can send ping to router and router also can ping PC1

The Result it always "Request timed out"

All of them can access internet through the router, i also tried to disable windows firewall and avast in both PC, tried reset the router with default setting, tried to change the vlan setting to " Group2 ActoiveYes ID2 e1,w0,w1,w2,w3,p0,p1,p3,p4" but still having issue

PC2 and Mediaplayer (Wireless to Wireless) can ping each other, so the problem lies only in Wired to Wireless and Wireless to Wired.

Edit: The forum screwed the ascii >_>

I got the answer from TPLink support guy, they said to disble the VLAN, now it works for me

I had the same issue. Deactivated the VLAN function (Advance setup -> VLAN) fixed the problem. Thanks Yantor

for D-Link modem please Uncheck the ‘Enable MultiAP Isolation’ from the Wireless\ Wireless Basic