Php not running mysql queries that add tables/innsert into tables

$continue = 1;
			echo "Checking details:<br />";
			echo "Connect to " . $_POST["host"] . "... ";
			$connection = mysql_connect($_POST["host"], $_POST["username"], $_POST["pass"]);
			if($connection)
			{
				echo '<font color="00ff00">sucess!</font><br />';
			}
			else
			{
				echo '<font color="ff0000">fail!</font><br />';
				$continue = 0;
			}
			echo "Select Database " . $_POST["db"] . "... ";
			$db = mysql_select_db($_POST["db"], $connection);
			if($db)
			{
				echo '<font color="00ff00">sucess!</font><br />';
			}
			else
			{
				if($continue == 0)
				{
					echo '<font color="ff0000">fail(Because connect failed)!</font><br />';
				}
				else
				{
					echo '<font color="ff0000">fail!</font><br />';
				}
				$continue = 0;
			}
			if($continue == 0)
			{
				echo '<br /><font color="ff0000">Installation failed. Please fix the problems and do the setup again</font>';
			}
			else
			{
				echo "<br /><br />Installing playr:<br />";
				echo "Setting up MySql database:<br />";
				echo "..." . $_POST["prefix"] . "songs... ";
				$name = $_POST["prefix"] . "songs";
				$sql = "CREATE TABLE Persons
				(
				FirstName varchar(15),
				LastName varchar(15),
				Age int
				);";
				if(mysql_result($query, $connection))
				{
					echo '<font color="00ff00">Sucess!</font>';
				}
				else
				{
					echo '<font color="ff0000">Failed!</font>';
					mysql_error();
					$continue = 0;
				}
				//Last check
				if($continue == 0)
				{
					echo '<br /><br /><font color="ff0000">Installation failed. Please fix the problems and do the setup again</font>';
				}
			}