hi Phongsathon,
http://urlquery.net/report.php?id=2427887 shows no current anomalies at the moment. However, having said that, this does not mean this IP address (103.22.182.242) has never been infected. If you look at the last 6 reports on this IP, you will see both alerts and IDS detections noted as recently as November 12, 2012.
avast! detections, as a rule, are almost always spot-on, but sometimes the webmaster must contact avast! and ask for an exclusion for the website itself within that domain if he/she believes their site is clean.
avast! does tend to block all sites within a domain on first detection, so the only way to fix is to have the webmaster contact avast!.
IF there is actually a trojan present, at least avast! is protecting you.