Arduino mega 2560 how to connect to the ethernet shield.

Wireless interface is on 192.168.6.x
192.168.6.91
255.255.255.0
192.168.6.1

i connected both ethernet shield and laptop with cisco switch and did the same test. but problem is still there. ping test works fine, however browser test fails.
tried it with 8088 port as well, same behavior. i'm suspicious of SPI communication between ethernet shield and arduino mega more than network settings.

Pin-Mega Pin-Ethernet shield
4 4
10 10
11 50
12 51
13 52
Reset Reset
IOREF IOREF
AREF AREF
ICSP header ICSP header

i disconnected the pins 11, 12, and 13 and ran the same tests but same behavior.