The type wicket.Component cannot be resolved. It is indirectly referenced The type wicket.Component cannot be resolved. It is indirectly referenced from required .class files

[Fernando Wermus]

Hi all!
        I got this error message from Eclipse when I download DataPicker
library and append the following line to the code,

        DateTextField bornDate=new DateTextField("player");
        bornDate.add(new DatePicker());

It seems to be a problem with Eclipse according to google, instead of
Wicket. But I couldn't solve it.
Does anyone happend this before?

Thanks!
-- 
Fernando Wermus.