Contacting your (adopted-out) adult child when they have gone away

Around the time of her birthday one year

Dear First Mother Forum: I reunited with my son a while ago, and he even lived with me and my husband (not his father) for a couple of months. But it seemed that he was only interested in how much money we had and what we could give him. He left six months ago and I have not heard from him since, even though I have tried to contact him, left messages, emailed, etc. No response.

His birthday is in a couple of weeks and I do have an address for him. Should I send him a card with some money?--Confused First Mother