Hello, my name is Dan.
I will do my best to help you, the only stupid question is the unasked one.
Step away from the shotgun.
There are a few things that will at least help if not cure this and a few that will cure this, all will help.
First, do a pram reset.
To do a PRAM reset, you need to restart your machine and hold down these 4 keys.
‘Option’, ‘Command (Cloverleaf or Apple)’, ‘R’ and 'P'.
Keep them down until you hear 4 startup chimes. This is the sound it makes starting up.
This resets all of the system buses on your computer, USB, FireWire, display, ethernet and your keyboard/mouse/trackpad.
This will correct many faults but not necessarily yours.
This may or may not fix the connection issue, it is a good starting point.
Next is repairing permissions, this PDF explains that.
Then following that if it still isn't connecting make a new location, this PDF explains how.
New Location 10.5-10.6
I am pretty sure that will fix it but on the off chance it doesn't please tell me.