Hello All,
I installed openwrt-ar71xx-generic-tl-wr703n-v1-squashfs-factory.bin and it apparently worked. I could connect Telnet to it and set a root password, but I cannot see its SSID in the list of available networks on my laptop computer.
Any suggestion to make the wireless work will be greatly appreciated. The wireless config file is listed below.

thanks in advance.

root@OpenWrt:~# vi /etc/config/wireless
config wifi-device  radio0
        option type     mac80211
        option channel  11
        option hwmode   11ng
        option path     'platform/ar933x_wmac'
        option htmode   HT20
        list ht_capab   SHORT-GI-20
        list ht_capab   SHORT-GI-40
        list ht_capab   RX-STBC1
        list ht_capab   DSSS_CCK-40

        option disabled 0

config wifi-iface
        option device   radio0
        option network  lan
        option mode     ap
        option ssid     'VNet'
        option encryption psk
        option key      '123456'
        option disabled 0

"123456" is too short for a valid psk, it needs at least 8 characters

It changed the password to "12345678" and it worked. Thank you!