How to use "File Change Trigger" in Re-framework

Can someone please help me?
I have a robot working in re-framework, I added a “File Change Trigger” activity in order to start working as soon as a file copied into a folder. The robot is working fine when it finds the file, however it only process the activities in “InitAllSetting” and “InitAllApplications” and stop there and doesn’t continue to “GetTransactionData”!
What steps did I miss?