ThreatFactor NSIA

When I try to scan http://www.msc247.com the following error is logged in the event log:

Event System: Non-fatal internal error Severity Error Date 08 Sep 2010 10:16:36 BST Notes stack_trace = "java.lang.IllegalStateException: Not connected com.sun.mail.smtp.SMTPTransport.checkConnected(SMTPTransport.java:1664) at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:590) at net.lukemurphey.nsia.GenericUtils.sendMail(GenericUtils.java:352) at net.lukemurphey.nsia.GenericUtils.sendMail(GenericUtils.java:238) at net.lukemurphey.nsia.response.EmailAction.execute(EmailAction.java:41) at net.lukemurphey.nsia.eventlog.SiteGroupStatusEventLogHook.processEvent(SiteGroupStatusEventLogHook.java:64) at net.lukemurphey.nsia.eventlog.EventLog.logEvent(EventLog.java:616) at net.lukemurphey.nsia.eventlog.EventLog.logEvent(EventLog.java:586) at net.lukemurphey.nsia.Application.logEvent(Application.java:1263) at net.lukemurphey.nsia.ScanCallback.logScanResult(ScanCallback.java:122) at net.lukemurphey.nsia.ScanCallback.logScanResult(ScanCallback.java:148) at net.lukemurphey.nsia.ScanCallback.logScanResult(ScanCallback.java:58) at net.lukemurphey.nsia.scan.ScanRule.logScanResult(ScanRule.java:142) at net.lukemurphey.nsia.scan.HttpSeekingScanRule.logSignatureScanResult(HttpSeekingScanRule.java:851) at net.lukemurphey.nsia.scan.HttpSeekingScanRule.doScan(HttpSeekingScanRule.java:830) at net.lukemurphey.nsia.Scanner.doScan(Scanner.java:162) at net.lukemurphey.nsia.Scanner.run(Scanner.java:125)"
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What is strange is that I am scanning 3 other sites with no problems but this one site simply wont scan, you see it trying to start then it just stops.

Any help much appreciated.