You set up a query for the row source for the combo box. Then in the other combo box, you set up a query for the row source and have the criteria look at the first combo box. In the click event of the first combo box, requery the other combo box.
The point I'm trying to make is that we cannot read your mind and cannot see your mdb. You have to provide details..... hopefully meaningful table,field, control and query names, not something like Table4 or Text6. Take the time to give proper names to objects, being aware of reserved words. For example "Name" or "Date" are bad choices because they are not very descriptive ("Name" of what, "Date" of what) and because "Date" is also a built-in Access function.
In six months or a year, if you have to modify the mdb, you will have a bad headache from banging your head against the table because you can't figure out what you were trying to do. Trust me: been there, done that, got the bumps on my head to prove it.
HTH
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Steve
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"Veni, Vidi, Velcro"
(I came; I saw; I stuck around.)