Collection on back child support almost 7 years old

I have a question about 2 old collections that happens to be back child support, my question is does this drop off of your credit report after 7 years like other collection. Or does it stay on my credit report forever?
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it drops off unless you are continually late or behind.
child support goes on until a child is 18 right?
that leaves a long time for another chance at screwing up and prolonging the 7 year problem
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No I am not late now I am current and is planning on staying current but these 2 collection will have been on my report 7 years July, are your saying that they will fall off in July which will be 7 years? If not can I call the credit reporting agency and ask for them to remove the collection in July? About 3 years ago I disputed one of them that was on Trans union and somehow it was deleted, but I look at my experian and I see it on that one. How can that be? Should I dispute experian telling them that I have has this deleted on one of my reports and that this should not be on theres?
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7 years past the column thats says date of last activity. yes
just because one bureaus drops an account, that does not mean another has to
it does mean, there is a possibly or maybe even a probabilty.
so
http://www.oskie.com/credit-dispute.htm
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Thanks you for your valuable info