|Your query is pretty sketchy on details.|
- Is this your home wireless network?
- Is the wireless network configured on a SOHO router you can access and control and if so, what is the make & model of the SOHO router?
- Is the wireless network encrypted and if so, are you entering the correct encryption key on the client when attempting to connect to the wireless network?
- Are the wireless clients able to "see" the WLAN you're trying to connect to?
That's a good start
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.