,thanks again,but tried that as well and i am using windows vistaThe big issue with Kies is really that the drivers don't work well with many USB chipsets. NVIDIA may make a good graphics chip, but their motherboard chipsets are pathetic when it comes to driver quality. In many cases, there are issues with some ports working properly with Kies and others not.
Kies does have the "diagnose connection problems" as something to try. You can also try plugging your phone in to the computer, then on the phone, go to the notification about "connected to USB" and then change to camera mode. Settings -> Developer Options and then turn on USB debugging can also help in some cases.
And then, make sure you are running from an administrator account. What version of Windows, or MacOS are you running on the computer?
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Another thing to try, use Kies from a different computer when all else fails.
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Uninstall Kies via control panel, then reinstall. After reinstalling check to see if Kies is up to date, if not update then restart computer, then plug phone and try again. Also, try connecting to a USB port on the back of CP rather than the one in the front.
lol lol tried all that too