Hmm i think i understand a little so each context need to have it's own ROOT directory (it would be much simplier without it :) ) for the <Host name="default.mydomain.com" ...> i forget it yes.
So i have create like you told two things : <Host name="default.mydomain.com > and <Host name="vhost1.mydomain.com" debug="0" appBase="/usr/local/tomcat/webapps/myaccount1" and i have /usr/local/tomcat/webapps/ROOT/META-INF/context.xml and /usr/local/tomcat/webapps/test/ROOT/META-INF/context.xml i am write? well the problem now is that i always get : Status report message / description The requested resource (/) is not available. my website is in the directory ROOT on both case (with a ROOT/META-INF and a ROOT/WEB-INF for both), what i am doingt wrong this time? thx