How do i with CheckBoxList put into SQL database, few selected items?

Hello,

first at all, sorry, but i`m new in this enviroment, and i`m "stuck" with some problem. If You can help, i thank You advance!

Let see...

I made in SQL - two tables, they are in relationship:






also in web developer i made a form:



So, when i select ONE item, and after i press INSERT BUTTON, i get this particulari value into ML_RLO table.



BUT - when i select 2 or more item, i also get only ONE value...

So I want, when i selected 2 or more item, and after "INSERT BUTTON" clik, all selected item get in ...