Why can't I set some memory created from one process through another using Boost.Interprocess?

Here is the server :

Here is the client :

I create two independent C++ console apps, one called server and other called client. Server creates and shares a memory, the client mostly reads it, but sets some signalling server to exit. Although the client exists properly along with proper memory checking, the server is never able to read the value set by client and hence never exists! Please advice.