popup spawns only once

[FiZzIk]

i am trying to make some popups for pictures, i have searched the forums but cant find an answer.

i am testing this code on a simple button

on (release) {
        getURL("javascript:var Name=window.open('aria.html', Name,'height=600,width=800,toolbar=no,scrollbars=no'); void(0);");
}

*NOTE in the code where it says "java script" its actually "javascript" the code formatting of the forums changes it.

the popup spawns correctly the 1st time i click on it, but if i close the popup and click the button for a second time nothing happens. this is incredibly frustrating as i have been trying to fix this problem for ages.
cheers.

[FiZzIk]

I have been trying other variations of code. in the attachment the code on the hotspots is exactly the same as in a different section and the other section works fine, these dont work at all


EDIT. i have tried exactly the same swf on 2 different webhosts
the host where the site is currently doesnt work and the test webhost does. are there any webserver settings that could be causing this?