If you mean it wont let you click on anything untill you close the "prompt" that is how it works it is waiting for input and wont do anything else untill it recieves it.
from help file:
a - activate dialog
Note: This identifier cannot be used in a script event. One way around this is to use a /timer to initiate an input request after the script ends.
-unless my understanding is wrong.. seems to be working fine for me.
winXP - v6.15