I have a Linksys WRT54G version 3 router running "Firmware Version : v4.70.6 - HyperWRT 2.1b1 - Thibor, Nov. 15, 2005" (note: the firmware info is cut/pasted from the web GUI). I'm trying to upgrade to the latest HyperWRT-Thibor v15c. I'm using the Web admin interface to try to upgrade the firmware but after about 10 seconds it comes back with an error "update are failed" message. I've tried this several times with a hard reset before each attempt. Any hints would be appreciated. Thx.