I am trying to build plugins for Confluence 5.5.2.

I have atlassian-plugin-sdk-5.0.13, window 7 (64-bit) and JDK 1.7.0_45 (64-bit), here is my atlas-version output:
====begin===
C:\Windows\System32>atlas-version

ATLAS Version: 5.0.13
ATLAS Home: C:\Users\rw5730\Documents\ATT\atlassian-plugin-sdk-5.0.13
ATLAS Scripts: C:\Users\rw5730\Documents\ATT\atlassian-plugin-sdk-5.0.13\bin
ATLAS Maven Home: C:\Users\rw5730\Documents\ATT\atlassian-plugin-sdk-5.0.13\apache-maven-3.2.1
--------
Executing: "C:\Users\rw5730\Documents\ATT\atlassian-plugin-sdk-5.0.13\apache-maven-3.2.1\bin\mvn.bat" --version -gs C:\Users\rw5730\Documents\ATT\atla
ssian-plugin-sdk-5.0.13\apache-maven-3.2.1/conf/settings.xml
Apache Maven 3.2.1 (ea8b2b07643dbb1b84b6d16e1f08391b666bc1e9; 2014-02-14T09:37:52-08:00)
Maven home: C:\Users\rw5730\Documents\ATT\atlassian-plugin-sdk-5.0.13\apache-maven-3.2.1\bin\..
Java version: 1.7.0_45, vendor: Oracle Corporation
Java home: C:\jdk\x64-jdk1.7.0_45\jre
Default locale: en_US, platform encoding: Cp1252
OS name: "windows 7", version: "6.1", arch: "amd64", family: "windows"
===end===

But then I ran the command:
atlas-run-standalone --product confluence --version 5.5.2
It the process look completed, because I saw these lines:
====begin===
[INFO] [talledLocalContainer] Tomcat 6.x started on port [1990]
[INFO] confluence started successfully in 129s at http://WACDTL03RW5730:1990/confluence
[INFO] Type Ctrl-D to shutdown gracefully
[INFO] Type Ctrl-C to exit
===end===

But when I went to http://WACDTL03RW5730:1990/confluence in my browser, I saw:
====begin===
type Exception report

message java.lang.NullPointerException

description The server encountered an internal error that prevented it from fulfilling this request.

exception

com.atlassian.util.concurrent.LazyReference$InitializationException: java.lang.NullPointerException
com.atlassian.util.concurrent.LazyReference.getInterruptibly(LazyReference.java:149)
com.atlassian.util.concurrent.LazyReference.get(LazyReference.java:112)
com.atlassian.confluence.setup.ConfluenceEncodingFilter.getGlobalSettings(ConfluenceEncodingFilter.java:47)
com.atlassian.confluence.setup.ConfluenceEncodingFilter.getEncodingInternal(ConfluenceEncodingFilter.java:37)
com.atlassian.confluence.setup.ConfluenceEncodingFilter.getEncoding(ConfluenceEncodingFilter.java:29)
com.atlassian.core.filters.encoding.AbstractEncodingFilter.doFilter(AbstractEncodingFilter.java:38)
com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)
com.atlassian.core.filters.HeaderSanitisingFilter.doFilter(HeaderSanitisingFilter.java:44)
com.atlassian.confluence.servlet.FourOhFourErrorLoggingFilter.doFilter(FourOhFourErrorLoggingFilter.java:65)
com.atlassian.confluence.web.filter.DebugFilter.doFilter(DebugFilter.java:50)
com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)

root cause

java.lang.NullPointerException
com.atlassian.spring.container.ContainerManager.getComponent(ContainerManager.java:33)
com.atlassian.confluence.util.LazyComponentReference$Accessor.get(LazyComponentReference.java:46)
com.atlassian.util.concurrent.Lazy$Strong.create(Lazy.java:85)
com.atlassian.util.concurrent.LazyReference$Sync.run(LazyReference.java:321)
com.atlassian.util.concurrent.LazyReference.getInterruptibly(LazyReference.java:143)
com.atlassian.util.concurrent.LazyReference.get(LazyReference.java:112)
com.atlassian.confluence.setup.ConfluenceEncodingFilter.getGlobalSettings(ConfluenceEncodingFilter.java:47)
com.atlassian.confluence.setup.ConfluenceEncodingFilter.getEncodingInternal(ConfluenceEncodingFilter.java:37)
com.atlassian.confluence.setup.ConfluenceEncodingFilter.getEncoding(ConfluenceEncodingFilter.java:29)
com.atlassian.core.filters.encoding.AbstractEncodingFilter.doFilter(AbstractEncodingFilter.java:38)
com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)
com.atlassian.core.filters.HeaderSanitisingFilter.doFilter(HeaderSanitisingFilter.java:44)
com.atlassian.confluence.servlet.FourOhFourErrorLoggingFilter.doFilter(FourOhFourErrorLoggingFilter.java:65)
com.atlassian.confluence.web.filter.DebugFilter.doFilter(DebugFilter.java:50)
com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)

note The full stack trace of the root cause is available in the Apache Tomcat/6.0.41 logs.
===end===

confluence-LATEST.log (attached) seems to complaint about database connection problems.

However, I tried the command:
atlas-run-standalone --product confluence
and latest version of Confluence (5.6.6) started with no problem.

So, how do I get
atlas-run-standalone --product confluence --version 5.5.2
to work properly?

In addition, I just check the page: https://marketplace.atlassian.com/plugins/atlassian-plugin-sdk-windows/versions and it's listing Atlassian Plugin SDK 5.0.13 (the latest) only compatible up to Confluence version 5.4.4.? Should it support the latest version of Confluence 5.6.6? If so that page needs to be updated.

Thanks.