Adding record to table based on combo box selection

I am just getting my feet wet in Access. I have two tables and one form. In the form I have a combo box which holds selections from one table. I would like users to be able to choose a selection from the combo box the enter a entry in the following field. When clicking save I would like this field plus the ID of the item selected in the combo box stored in a table.

I am attaching an example as it is far easier to show than explain. Any help would be greatly appreciated.

Thank You!

I am using Access 2007

Here is the code for adding a record to the table just try this may be helpful for you..

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On the Form Open of Task I have the following code

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On the task form I have the following save and close button

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