i need a solved.my problem is that,i have my apache and dns configured and on the same machine(server)and am abble to lunch and used this services. but my clients computers are not abble to luch the wepsite that we created and the dns is not resolving in our clients computers.

Well, the answer is simple; make your clients use your DNS server for name-resolution. You don't say what kind of clients, what they're running, or how they're getting their IP information now, so it's hard to give anything more than a broad answer.

If they're getting addreses and IP information via DHCP, then go onto your DHCP server and put your name server in at the top of the DNS server list. If they have static addresses, you will then have to visit each client, and manually configure them. This isn't something that can be pushed down from a DNS or Apache server, so you'll have to address it elsewhere.

Maybe your firewall is blocking access to your DNS server. What does running the following command as root show you: