[imp] popup-problem in IE not in mozilla

[alois blasbichler]

hello list

we use Horde: 2.2.4  and IMP: 3.2.2
I have noticed a problem when i use Internet Explorer (6.0) like browser : the
popup window for new mails in the INBOX dont works correct : somtimes it
appear, somtimes i have to click on the IE-window that it starts.

With mozilla ore Firebird the popup works great.

Is this a misconfiguration of my IE or a known problem ?

thank you for a answer
luis