I tried to send/receive files under my msn account in all these three applications. They are too slow, its like 1kb/s. I tried to open the port in my router. But it doesnt help at all. It helps when i open port in aMSN, but only when the file is transfer near my area.. when my friends from other countries send to me, its ridiculously slow.. However, when I try to use windows under mac os in vmfusion, the file transfer in windows live messenger is better. Im using Leopard if that matters.. Please give me some guide!!