Popup closed ... ?

Hi,

A little problem, in fact 2 but this is maybe the same cause ...

1st : 1 have 2 frames (named left + right).
On left, a button calling standalone.php on the right frame
When clicking the left button, the ckfinder is well loaded on the right.
But, when double clicking on an image, the SelectFunction is not called .... (the alert box is not displayed)

2nd : same organisation with 2 frames ... and same button on left, but it opens a new window
When clicked, the new window is displayed and the ckfinder is also well loaded into it
But, when double clicking on an image, the new windows is closed (and the SelectFunction seems not to be called, the alert box is not shown)

Any idea ?