newbee having trouble using the mission editor

im new to sh3 and was just a reader here till now but im having a hard time with mission editor. i have sh3 1.4b with and without gwx (i swap data files back n forth till im sure im keeping wolves) i wanted to try editing a mission so i selected a mission to edit then click on parameters, only the box opens and runs past the bottom of my screen and i cant close it or do anything to recover. i have to use ctrl+alt+dlt to get out. what am i doing wrong? i dont know if there are buttons that i cant see out of site or something? the mission editor box is also about 3 inches larger than my screen as well but i can drag it around to access everything. i dont know what im doing wrong. please help a newbee