This might help.

Here is a link that might be useful: roses from seed

Jessica,
You do realize that any roses you grow from seed are unlikely to bear more than a passing resemblance to the plant whose seeds they came from? In other words, you will not get a replica of the original plant. It will be pink, and it will be a once bloomer, to be sure, but the bloom is unlikely to be more than vaguely reminiscent of its parent.

If you want copies of 'La Ville de Bruxelles' then you need to propagate it by cuttings or bud grafting, not by seed.

do I didn't know that.... Thank you for telling me