Checkbox appears readonly when using selectbooleancheckbox

I am using selectbooleancheckbox type to render checkbox on a table column for transient parameter of type boolean in my VO..but when I execute the page, I am getting checkboxes are readonly in all rows of the table. If anybody has encountered such problem before, can you tell me whats the possible soln for this?

Hi John,
Me too is facing the same issue. I verified my VO and it has the updatable flag set to "Always".
Please let me know how to make the bound boolean check box as editable.
Thanks
Rathnam

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Checkbox appears readonly when using selectbooleancheckbox

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