Sstrhsrtj

I am unable to get the figure environment to work with only in beamer along with updating figure caption.

Here is sample code:

begin{frame}{VERIFICATION & VALIDATION}

    begin{columns}

        begin{column}{0.5textwidth}

            begin{itemize}

                item 

            end{itemize}

        end{column}

        begin{column}{0.5textwidth}

            only<1>{begin{figure} includegraphics[width=0.8textwidth]{Fig9-cropped} caption{Case 2, Mole fractions} label{Fig12} end{figure}}

            only<2>{begin{figure} includegraphics[width=0.8textwidth]{Fig10-cropped} caption{Case 3, Mole fractions} label{Fig13} end{figure}}

            only<3>{begin{figure} includegraphics[width=0.8textwidth]{Fig11-cropped} caption{Case 4, Mole fractions} label{Fig14} end{figure}}

            only<4>{begin{figure} includegraphics[width=0.8textwidth]{Fig12a-cropped} caption{Case 5, Mole fractions} label{Fig15} end{figure}}

            only<5>{begin{figure} includegraphics[width=0.8textwidth]{Fig12b-cropped} caption{Case 5, Temperature} label{Fig16} end{figure}}

        end{column}

    end{columns}

end{frame}

The main problem is that the captions do not update at all. Is there a workaround? Thanks for the help!