Error on windows xp with a macro created in excel 2000 and windows2000

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Hello people

I have a macro creted in excel 2000 and windows 2000 that function OK in
others computers with same Operating System. But I am migrating to
Windows XP /excel 2000 and the users with windows XP the macro don't
function. Does anybody have solution?

1.- The errors are in "combobox", "commandbutton" and other objects:
Error of compilation. Don't find the metodo or member data

2.- And if I try insert any object the computer say : Error to insert
the object. I've tried to reinstall office 2000 without good result

Thanks for all