Hi, I have a WRT54G v3.1 with DD-WRT 23 SP2. This router connects to a motorola SB6100 modem. If my laptop is directly connected to the modem, the speed test can attain up to 70 Mbps (I have a 100Mbps cable service). However, if the laptop is behind the router, the max speed is only 21Mpbs. I need to use the router to provide internet access to other PCs in my house. Can anyone give me some hints on this problem? Thank you.