I cant create new record via drop box

[Xiphias]

Hi,

Can someone help me to create a drop box where I can also add new records?

Here is the problem:

I m working on a form with a drop box.
When I select a '"name" in the drop box the form will change to that record.
This is ok

If I type a new "name" in the box and press enter, the record will be safed
with the new"name" and I will loose the old "name"
And what I want is that after typing a new"name" the record changes to a
blank record

The "name" is the primary key.

I also did a test with the auto ID as primary key and then I cant add a
new"name".

I have heard that its better not to make the auto ID the Primary record, but
I cant remember why

Greetings,
Xiphias