Tl-wa5210g wrt54g configure - TP-LINK TPLink TLWA5210G 24GHz High Power Wireless Outdoor CPE IEEE 80211 bg Up to 50km Wireless Ra (TLWA5210G)

SOURCE: i recently purchase a TP

Are you using straight cable or cross cable. you must use straight cable for configuring this router. If LAN light does not turn on after using straight cable then there must be problem with router itself.

SOURCE: in my device wirless strangth

http://www.tp-link.com/en/support/downloadFiles.aspx?mid=01030301&version=V1&pmodel=TL-WA5210G
Seems a problem with the firmware. Double check if your product is the same as the link above and apply the fix described in the support page.
Top firmware version 09/30/2010. this firmware version will include the previous fixes like LED is not ON. Download the file decompress and execute. Please use a wired connection (CAT5/6 network cable) between your computer and the outdoor device. Do not use the wireless connection and be sure that both devices (source computer and destination AP/router/wireless TP device are powered up at mains (no batteries). Back-up yor settings as a firmware update is possible to erase all your settings.
A bit of trivia:
Your wireless outdoor device is decent but not "50km". For that you need a big comms tower.
Good luck.