Rollover/Rollout problem

hey everyone! im having trouble creating something that is probably very simple to most but im fairly new to flash. what i am trying to achieve is have a rollover on a button that pops up a ‘window’ with some text on it (i have this bit worked out) then once the user has finished reading the text they rollout from the ‘window’ and the image behind is restored.

i have attached the .fla so you can see what i mean.

what is going wrong is that the active part of the rollover on the button is only very small and as the ‘window’ expands and then reveals the text, the active part of the button remains small. so when the user moves his or her mouse the ‘window’ disappears. i’d like it to stay open until they rollout from the entire text window.

thank you in advance for any help. much appreciated.