Service Item cannot be modified in this form

Hi there!

I have a small problem. On a new Form I have one Tablebox and one textbox.

The form has Source table = “Service Item”. The Textbox is for filter records shown i the tablebox.

Initially the tablebox shows all records from “Service Item”.

I filter the “Service Item” after every input in the textbox.

As I type something the Tablebox show 10 rows. After more typing it perhaps shows 2 rows.

Everything works fine but when i click in the tablebox a got the message: “Service Item cannot be modified in this form”

Can anyone help me?

Regards Håkan