How can I deliver three TMS in a movie stimuli using p-port?

Hi,
I have a problem about TMS delivery. In my produce, I set a movie stimuli for 1.6s, and I want to deliver three TMS at 0.25s, 0.45s, 1.05s separately. But when I run the program, the last TMS(named T2) cannot be delivered.
Please see it throuth this picture.