I don't know is this is the right forum to post this topic, but this is the most general forum so.. I'm running II5.1 on WinXp sp2 and sometimes asome users tell me that cannot access to the forum due to many user already connect to the server. Is it possible?? how can i solve the problem?? where can i set the max users??
No, IIS is the only option. If you're hosting from home, and want to keep doing so, you need to use a server operating system, like Windows 2003 Server. IMHO, you'd better get a paid host.
With a server OS, there is no limit. The max number of users will be determined much more by the ability of the server to handle online users - RAM, CPU and disk will be the limiting factors.
I stronly advise against hosting on your own unless you have a strong technical knowledge of the OS in use and of the security issues that may arise with hosting.