This line
$sqlCCUpdate = "UPDATE tblCustomer set CuCCType = '" . $CCardType . "', CuCCNum = '" . $CCNum . "', CuCCSVC = '" . $CCCSV . "', CCExpDate= '" . $CCYear . "',CCName='" . $CCName . '" WHERE CuSessID = "' . $_COOKIE['PHPSESSID'] . '";
should be
$sqlCCUpdate = "UPDATE tblCustomer set CuCCType = '" . $CCardType . "', CuCCNum = '" . $CCNum . "', CuCCSVC = '" . $CCCSV . "', CCExpDate= '" . $CCYear . "',CCName='" . $CCName . '" WHERE CuSessID = '" . $_COOKIE['PHPSESSID'] . "'";
You had the single and double quotes the wrong way round and you needed the closing double quote.
EDIT: same problem in the query above it