[SOLVED] Query returned false?

if (! isset($error)) {
		$insert_q = "INSERT INTO `GUESTBOOK_entries` (name, email, website, message, date, ip) VALUES ('".addslashes($name)."','".addslashes($email)."','".addslashes($website)."','".addslashes($message)."',NOW(),'".$_SERVER['REMOTE_ADDR']."')";
		$postentry = $db->Query($insert_q);
	}

public function Query($sql) {
		$this->ResetError();
		$this->last_sql = $sql;
		$this->last_result = @mysql_query($sql, $this->mysql_link);
		if(! $this->last_result) {
			$this->active_row = -1;
			$this->SetError();
			return false;
		} else {
			if (strpos(strtolower($sql), "insert") === 0) {
				$this->last_insert_id = mysql_insert_id();
				if ($this->last_insert_id === false) {
					$this->SetError();
					return false;
				} else {
					$numrows = 0;
					$this->active_row = -1;
					return $this->last_result;
				}
			} else if(strpos(strtolower($sql), "select") === 0) {
				$numrows = mysql_num_rows($this->last_result);
				if ($numrows > 0) {
					$this->active_row = 0;
				} else {
					$this->active_row = -1;
				}
				$this->last_insert_id = 0;
				return $this->last_result;
			} else {
				return $this->last_result;
			}
		}
	}