ACE VERSION: 5.5.8 HOST MACHINE and OPERATING SYSTEM: Linux 2.6.20-16-generic and Ubuntu 7.04 Hi all: I am developing a UDP server using ACE and found : (1) Proactor do not work on my host ( Linux 2.6.20-16-generic and Ubuntu 7.04), but works well on another on(Windows XP). I use a client to send packets to it and seems no packets received by it.