No zero possible in .fill in the blank. ?

Well, you leave a lot out of your description -- mainly what are you talking about in the control option? Are you referring to the Wizard feedback? Are you referring to what happens when you go to the next page? Are these questions in a test or not? If in a test, do you have the option to require answers turned on? Are you checking the answer yourself by having the student click a button which then checks the answer? Do you have actions attached to the On Select/Change tab on the entry box and if so, what are they? Why can't it handle 0? Basically, I need more info re. how you are getting things to happen - what kind of actions your are using and what triggers them (next page button, check my answer button, ???)