when i try to make a report the app crash

i finish my app and i try it on another machine before send it to the client and when i want to make a report it give me app has stopped working  i don,t if that from the dataset (xml file of the report) because i make a dataset that write the data to te xml and i mame a connection between the xml and the report i don,t know if that happen when i change the location of program or what??