[my-symbols] correct overlay specification for check boxes

my-symbols.sty

@@ -19,8 +19,8 @@
 \newcommand\myboxnocheck{\stackinset{c}{}{b}{}{$\Box$}{\mynocheck}}
 
 \@ifclassloaded{beamer}{
-\newcommand\mycheckquizz[2]{\onslide*<all:#1>{$\Box$} \onslide*<all:#2 |handout:0>{\myboxcheck{}}}
-\newcommand\mynocheckquizz[2]{\onslide*<all:#1>{$\Box$} \onslide*<all:#2 |handout:0>{\myboxnocheck{}}}
+\newcommand\mycheckquizz[2]{\only<all:#1>{$\Box$}\only<all:#2|handout:0>{\myboxcheck{}}}
+\newcommand\mynocheckquizz[2]{\only<all:#1>{$\Box$}\only<all:#2|handout:0>{\myboxnocheck{}}}
 }{}
 
 \newcommand\parframe[3]{%