TMSGrid FreezeColumns

This is my first time using TMSGrid. Besides, my English isn't perfect either.:) Sorry if I sometimes phrase it strangely!
My problem is the following:

  1. If I turn on the FreezeColumns property, it does not bring values ​​to the cells!
  2. There is a checkbox in the first column, I would like to set it to readonly, but I can't turn it on, but the checkbox is active!

Thanks in advance!