Disappearance of Gizmo plot

Dear all
I am Igor(6.20 for Mac 10.6.4) user but I am not familiar with the Gizmo.
I am trying to create a 3D Gizmo surface and scatter plot. However, when I check the manual range checkbox (Gizmo menu -> axis range... -> Panel of Gizmo axis ranges) to change axis range, suddenly surface and/or scatter plots disappear with all axes in the Gizmo window. If I undo checking and drag a corner of Gizmo window to change the window size, these plot and axes appear again. This phenomena is shown by the Igor(6.12) too. Could someone help one that?

Thank you all in advanced

Sincerely

Riki
Some screenshots before and after checking the manual range checkbox would be useful in figuring out what is going wrong.

You might need to send the experiment to support@wavemetrics.com.

--Jim Prouty
Software Engineer, WaveMetrics, Inc.
Dear Mr. Jim Prouty

Thank you very much for the help.
There are two screenshots before and after checking the manual range checkbox.

I will try to send the experiment to the support.

Sincerely

Riki
before.png after.png