Hmm I wonder why you can't find out what Annex you are on.
You need to do this via a command line not the router GUI
Simplest way to be sure would be to call your ISP and ask them to set you to Annex A.
Are you in at the test socket underneath the cover of your BT master socket?
EDIT: Just checked an earlier post where you said you can get over 16 meg from the test socket - this means your extension wiring is at fault and you need a filtered faceplate to stop it interfering with the ADSL.
Here's a link to my guide on installing a filtered faceplate:
http://www.techbroadband.net/forums/spe ... plate.htmlyou can't get a better sync rate on the extension because it is the wire itself causing the ADSL to slow down. the router needs to stay at the master socket with a filtered faceplate, and use an ethernet cable to bring the broadband upstairs. That's the only way to preserve the stats you get at the test socket