Thank you for your suggestion Shaggy
Finally I solved the problem by myself. After I downloaded nice app from k2r at this post:
https://www.mobileread.com/forums/sho....php?t=8802/#5
and read the log file. I came up with some idea and solved the problem
first the log file told me that the iLiad couldn't find the specified SSID
even I saw it from the connection wizard.
second My SSID was "B[e]Er" which contains some special characters.
After I analyzed this, I changed my SSID to "Beer" and tried to connect
again. It's work
conclusion: If you set your wireless router according to this list
Security :WEP 10 digits
DHCP: enable
don't forget to set your SSID to use only charracter a-z and maybe 0-9
(for number I didn't test)
thank you for looking