problem in mass change of trade promotion in marketing after upgrade

Hi,

we are creating trade promotions. Our CRM system is upgraded from 5.0 to 7.0

And a method is executed in saving promotion if status is changed. In method, we are using email functions to send some data to users. In individual trade promotions there is no problem. Everything is ok. But in mass change after changing the status of trade promotions and apply changes, method is executed for all of them, I see in debug mode, status is changed for all of them but mail sending (ppf functions) is not done for all of them. Why does it happen? I have searched for oss notes, searched in SDN but I can't find the reason, so the solution...Can you help please?