failed to load bootstrap javascript ./VAADIN/vaadinBoottstrap.js in sub-dom

I suppose that this should be something relative simple, but it seems that I miss something…

my url is http://drakator.gr/wbox
and my web.xml contains:

[code]

wbox
com.vaadin.server.VaadinServlet

Vaadin UI class for Teacher
UI
wbox.WboxUI


Legacy mode to return the value of the property as a string from AbstractProperty.toString()
legacyPropertyToString
false


widgetset
wbox.widgetset.WboxWidgetset

true


wbox
/t/


wbox
/VAADIN/

<servlet>
    <servlet-name>WboxServlet</servlet-name>
    <servlet-class>wbox.servlet.WboxServlet</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>WboxServlet</servlet-name>
    <url-pattern>/wboxServlet</url-pattern>
</servlet-mapping>

[/code]http://drakator.gr/wbox/t opens my vaadin application normally.

now… I want to use http://wbox.drakator.gr instead of http://drakator.gr/wbox and so I created the
http://wbox.drakator.gr sub-domain on tomcat.
why http://wbox.drakator.gr/t does’t open my vaadin application?
it replies with
“failed to load bootstrap javascript ./VAADIN/vaadinBoottstrap.js”

what am I missing ?