You need to open a command prompt (aka DOS box), navigate to where your chatserver.exe is and run it from there, then it will display any error messages without closing the window.)
Code:
Microsoft Windows [Version 6.0.6002]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.
C:\Users\Steve>cd \eqemu
C:\eqemu>chatserver
[Debug] Starting Log: logs/eqemu_debug_chatchannels_4208.log
[Debug] [UCS__INIT] Starting EQEmu Universal Chat Server.
[Debug] [UCS__INIT] Log settings loaded from log.ini
[Debug] [UCS__INIT] Connecting to MySQL...
[Status] Starting Log: logs/eqemu_chatchannels_4208.log
[Status] Using database 'ykesha' at 192.168.1.100:3306
[Debug] [RULES__CHANGE] Loading rule set 'default' (1)
[Debug] [RULES__CHANGE] Set rule Adventure:DistanceForRescueAccept to value 10000.0000000000000
[Debug] [RULES__CHANGE] Set rule Adventure:DistanceForRescueComplete to value 2500.0000000000000
<snip>