using timer inside a loop-

hey.. I am stuck on this all day- I even made a couple of different versions.. but no luck so far-

my GUI's aim is to show images and to get a response from the user - a response can be a key press (E or I) or no response..

between the images themself there should be a3 seconds pause showing some text (a7 UIcontrol in my code)

the problem is that I need to do it for 30 times so, I use a loop with a timer inside it but , the GUI works bad..

it should do as follow- (the numbers are not important)

for 30 times do-  
2 sec showing text (a7)
then showing an image for 3 sec or until I\E are pressed
end

this is my code- I am adding two versions, because they are differ mostly in the TIMER functions and properties..

https://docs.google.com/document/d/11FQOIAA6c9Szo5GdkPsXVyvxoHYUiR4L3cXBKHzi1QQ/edit

https://docs.google.com/document/d/1N6LSDAYo_DVrBCUbuPth4JPCvkI3pBNcnAZcV6Kl9wM/edit

and the photos are here( although u can use any 2 jpg photos)-

https://picasaweb.google.com/alex.goltser/ScrapbookPhotos

at first the problem was always an error- ' u try to start the timer when it allready works' , but now it is something else..

will appreciate any help