combo box loose it's value

Thanks Alex for your answer, but it is not loosing the value when i
reload again. it is keeping the value but after the reload when i
decided to change a value on different textfield i  TAB pass the combo
box, at this moment it highlight the existing value and all look good
now if i save and reload; it looses the value.

The answer is dhtmlx.com/docs/products/kb/inde … mal&q=9507