Well, here is the guideline in order to allow a flashing of olegs firmware
(or to give your router a chance.....)
hopefully it works....

1.) download the file WL500gp-1.9.2.7-7g.zip from http://oleg.wl500g.info/1.9.2.7-7g/ and unzip to a new folder e.g. My Documents, AsusOleg
and cd to that directory
2.) download the files below (attached)
3.) set your network settings of your pc manually to 192.168.1.5
4.) follow the guideline which I posted before and use wl500g-clear-nvram.trx and wait some minutes
5.) now follow the guideline again and use wl500g-restore.trx and wait some minutes
6.) same again and now use the downloaded file WL500gp-1.9.2.7g.trx wait about => 10 minutes

good luck!

Well my account is broken right now, therefore I can not upload the second file wl500-restore.trx
The file should be available somewhere.... I'll upload it tomorrow (hopefully my account works),
now its too late here (MEZ)
But anyhow, here is the first one...http://wl500gp.lima-city.de/tools/