I have 5.0.0.3 too! It hasn't let me log in for weeks! Last time I logged on I downloaded a lot of data, maybe I hit a quota! But all I get: connected OK, then Disconnected.. Then it switches to another server. It doesn't say anything.. and hardly any bytes are sent or received.
Check under "view" to see if status bar is checked, if it is at the bottom of the screen in the middle you should see the server name eg. cc-04.sc8.finance.lycos.com
Hi PK
Try updating the continuumclient.
failing that, rename the continuum.ini file to continuum.ini.old
delete the continuum.ini file also the mkthours.inf file
close qcharts, re-open and hopefully that should be it....