Michel,
I'm just reading you rthread and I have two suggestions to test.
1) If you do the select Other without the "go top" does it work?
2) Replace the "Select Other and go top statement" with a wait windows with a little comment. If it works, it might be a speed related issue.
As I said these are just ideas I had and it might not lead you anywhere.
HTH,
Diane Robitaille
Diane Robitaille eng.