problems with popup windows and drw cant call the server anymore

Hello guys i am little rookie with DWR, 

i am using with spring, i have in my project the dwr version 1.1.4
and i work with firefox in linux version 1.5.09 and 1.5.10

i have declared in my dwrl.xml this

<create creator="spring"
javascript="idDWRajaxControllerLineaCategoriaArticulo">
     <param name="beanName" value="idAjaxControllerLineaCategoriaArticulo"/>
</create>

and its reference is

/dwr/interface/idDWRajaxControllerLineaCategoriaArticulo.js' with the
engine.js 
of course

i have this weird problem
a father.jsp and popup child.jsp, and both use the same controller 
idDWRajaxControllerLineaCategoriaArticulo

the child.jsp work with dwr to work with dynamic <selec> and fill a small
form, after that
i create dynamically rows in a table, with the data of the child.jsp,
and each row has a button that should work with ajax/dwr

but when i close the popup, i see that the rows in the father.jsp cant call
to the server and crash

and shown a window error message how the in photo

the weird is that if i dont close the popup, some times, work the button in
the father.jsp

how i can resolve this???


thanks for advanced


p.d: window.close() i use http://www.nabble.com/file/6702/errordwr.png 
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