Feeling Lost (again)

The thing about family is their consistency. I am the eldest of three children, and the only girl. But my brothers are far from babies these days. At the age of 25, they SHOULD be able to remember dates and make small efforts, yet, it seems that they are remaining real 'little brothers' in this regard. And at 35, with our mother dead almost 8 years, I would really appreciate some contact or effort. I realize that everyone is busy. Everyone has their own lives and priorities. But it seems that any tradition or commitment to relationships within the family was swept away with my mom. This really makes me sad. As a family, we had a lot of good times together. Yet today, my dad and each of us kids, are flying solo. I at least have my own little family.
I feel guilty that they are alone, but my efforts to stay in touch seem to only get a luke-warm response. Dad is not bad with email, but my brothers will go months without touching base, and no one has phoned me since I moved to Ireland in 2001.
Does this count as normal these days? Is it the age we are living in, or does this have more to do with us being broken still from my mother's death?
And if we are broken, is there any chance of repairing what is wrong?
I recently took down a notice board I had hanging over my desk, with this bit of newspaper tacked to it-- a little note from my brother, from 2000 or 2001....I think it had been attached to a book he bought me as a belated birthday present when I came to visit. It made me cry on the day, because I honestly adore my brother, and I have the same response now. I miss him, even though he has missed every birthday since.
It's Monday. It's raining here in Ireland. I wonder what my brothers are doing in Atlanta and Korea.....
I just might have to try and track them down. (again)