Setting initial covariance fails in amcl

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Hi

Even though I am changing the values of the covariance in the "amcl" launcher

    <!-- Initial pose covariance -->
    <param name="initial_cov_xx"    value="0.10*0.10" />
    <param name="initial_cov_yy"    value="0.05*0.05"  />
    <param name="initial_cov_aa"    value="(M_PI/12)*(M_PI/12)"  />

I keep getting the same amcl_pose in rviz (it displays the default covariance )

I am using: rosdistro: kinetic rosversion: 1.12.14