Forums Bug Reports mirc 6.21 blocks other aplications

hi ,
ever since i use 6.21 i get problems with other aplications.

if mirc is running more than 5 hours ( maybe a longer ) and i try to start up smart ftp or listen to internet radio with wmp , those aplications wont word.
if i close mirc and restart mirc i have no problems with other aplications till mirc has run for a long period again.

i never had those problems with the 6.1.... versions