I always see messages can't see IB account, can't log on IB during weekend. Looks like they use weekend to do their maintenance, don't you wish every site run like ET.
IB states their servers will be up at 12 EST noon on Sunday. I guess this doesn't apply to papertrading accounts though I do think TWS could be changed to check if the servers are down (even just by checking the time) and give a message saying you can't log in until noon sunday -- that would get rid of 99% of these posts