Error in DVDSANTA

hello im new here.

whenever i try to convert a AVI to dvd with dvdsanta i get a illegall operation and have to close it. i uninstalled and reinstaleld and it still says it.

i noticed if i leave the illegall operation window there it will still convert but i dont want to do it liek that. please help?

windows xp SP2
amd anthlon 2800+ @2.1ghz
200gb HD