If you disable the wireless, does the behavior continue?
No nothing happens and I know it might be interfrering that's why I'm trying to change the chanel but every chanel I set keeps reseting the router ( apart from factory defaults). Right now I'm trying to get rid of the problem with beta fw I hope it works
Update 1:
After installing 1.22 beta the logs are:
[INFO]   Sat Jan 31 10:37:58 2004   Blocked incoming TCP packet from 64.78.164.232:80 to 192.168.1.122:56877 as FIN:ACK received but there is no active connection
[INFO]   Sat Jan 31 10:37:51 2004   Blocked incoming TCP packet from 64.78.164.232:80 to 192.168.1.122:56970 as FIN:ACK received but there is no active connection
[INFO]   Sat Jan 31 10:37:48 2004   Blocked incoming TCP packet from 64.78.164.232:80 to 192.168.1.122:56976 as FIN:ACK received but there is no active connection
[INFO]   Sat Jan 31 10:37:46 2004   Wireless link is down
[INFO]   Sat Jan 31 10:37:46 2004   Wireless restart
[INFO]   Sat Jan 31 10:37:46 2004   Disconnect all stations
[INFO]   Sat Jan 31 10:37:46 2004   All Wireless shut down
[INFO]   Sat Jan 31 10:37:44 2004   Wireless restart
[INFO]   Sat Jan 31 10:37:43 2004   Blocked incoming TCP packet from 199.7.50.72:80 to 192.168.1.122:56898 as FIN:ACK received but there is no active connection
[INFO]   Sat Jan 31 10:37:42 2004   Blocked incoming TCP packet from 64.78.164.232:80 to 192.168.1.122:56976 as FIN:ACK received but there is no active connection
[INFO]   Sat Jan 31 10:37:42 2004   Wireless restart
Update 2:
In the new fw the router acts the same ( I can't change anything in wireless exept authentication)