JDK1.3's ServerSocket can't run normally.

[Guohai Jiang]

My Jdk1.3 under hp-ux 11.00 can't use ServerSocket to communicate with other machine. some tech support tell me maybe i miss some patches, but i don't know which patch should i install. the java program is very easy, they run well under linux and winnt platform. but when i run it under hp-ux 11.00, a SocketException throws. the program only accept a socket connection, and then send a string to the client. i can't understand why this occurs. which patches i should install to fix the problem. thanks.