Hello, I have an older WRT54GS (v1 I think) running Tomato 1.23 There are two computers connected, one wired and one wireless via a WMP54GS card (latest drivers). Both machines run Win-XP SP3. The wireless machine is about 10m from the router with one drywall between them. The wired gets good speed (very close to the promised 6Mbps down / 500Kbps up). The wireless fluctuates between tolerable and unusable. "Unusable" means waiting several minutes for a web page to load, the DslReports speed test either not completing or showing <10% throughput, the "Tweak Test" timing out, etc. I am attaching some images with my configuration. This is on a good day. A couple of days ago, the measured quality was 12 to 16 and web browsing was unusable. I suspect that this is the problem but I am not sure. And even if it is, I don't know how to tackle it. Here are some more screenshots with info: Please advise! Thank you, Alex.