I bought a Linksys WRT55AG dual band wireless router as I want to use 802.11a (the 2.4GHz range is very crowded where I live). I plugged it in, set up the basics (I even followed the setup guide exactly), and tried it online. I can browse low-bandwidth stuff just fine, but if I try to do a bandwidth test or download a file of any decent size, it just doesn't work. For instance, the Glock pic on the GT homepage took a few seconds to load. I have been running a WRT54G router just fine. I've checked all the settings and they appear identical. This problem exhibits itself by both wired and wireless connections on two computers. I have a normal connection if I connect the computer directly to the cable modem. I have no trouble with the connection between my computers-I can transfer files wirelessly at ~20 Mbps and wired at >80 Mbps. This is my second WRT55AG router-I exchanged the previous one after speaking with Linksys tech support and presuming it was defective. I highly doubt this is the case as the second brand new one has the exact same problem. Here's something weird: I just did a dialup bandwidth test (it took about 15 minutes or so) and got odd results- an upload bandwidth of 206.1 kbps and a download of 9.4 kbps. If I take out the router and directly connect to the modem I get a upload of 240.5 kbps and download of 1428.9 kbps. I did try changing the MTU last time-I changed it to 1400, 1500, and 576. 576 made it very slightly faster but still not even close to decent. I couldn't tell a difference in anything with the other two. It's currently set to auto (as was my previous router). Any ideas? Thank you!