Installing 7.5 using ACM on a windows 8.0 standalone machine and getting an erro

The system requirements explain that Appian 7.5 requires JDK 7 but you are using JDK8. Uninstall JDK 8 and download/install the right JDK version that will show the problem.

Thanks..
I uninstalled JDK 8 and installed JDK 7. Also updated PATH and JAVA_HOME environment variables. Now I'm getting following error

ERROR com.appiancorp.core.timer.timers.TransientTopicHeartbeat - No acknowledgement from TransientTopic, forcing rules cache to be cleared now.
The error is on line 248 (attaching server log as well)

server.log

You can disregard that false positive your server.log shows that your environment is working fine now.

Excellent that works...is there a default appian user/password for logging into the suite?

Take a look a the documentation and its "Initial Login" section at forum.appian.com/.../Starting_and_Stopping_Appian

Great...it works
Thanks

Eduardo:
My windows install is working fine. Now I'm installing Appian 7.5 in cloud on a linux server. Appian comes up fine. I'm having issues with starting JBOSS.
My environment
UBUNTU 14.04
JAVA 7 Installed
LAMP installed...which includes MySQL also created two DS primary and business.
Access to the database through PHPmyadmin however the database shows localhost whereas my environment is set for "dev" not localhost.
Getting following error
05:57:39,003 ERROR [org.jboss.as.connector.subsystems.datasources.AbstractDataSourceService$AS7DataSourceDeployer] (MSC service thread 1-4) Exception during createSubject()PBOX000016: Access denied: authentication failed: java.lang.SecurityException: PBOX000016: Access denied: authentication failed
          at org.jboss.security.plugins.JBossSecuritySubjectFactory.createSubject(JBossSecuritySubjectFactory.java:84)
          at org.jboss.jca.deployers.common.AbstractDsDeployer$1.run(AbstractDsDeployer.java:1069)
          at org.jboss.jca.deployers.common.AbstractDsDeployer$1.run(AbstractDsDeployer.java:1064)
          at java.security.AccessController.doPrivileged(Native Method) [rt.jar:1.7.0_55]
          at org.jboss.jca.deployers.common.AbstractDsDeployer.createSubject(AbstractDsDeployer.java:1063)
          at org.jboss.jca.deployers.common.AbstractDsDeployer.deployXADataSource(AbstractDsDeployer.java:876)
          at org.jboss.jca.deployers.common.AbstractDsDeployer.createObjectsAndInjectValue(AbstractDsDeployer.java:338)
          at org.jboss.as.connector.subsystems.datasources.AbstractDataSourceService$AS7DataSourceDeployer.deploy(AbstractDataSourceService.java:316)
          at org.jboss.as.connector.subsystems.datasources.AbstractDataSourceService.start(AbstractDataSourceService.java:120)
          at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811)
          at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746)
          at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_55]
          at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_55]
          at java.lang.Thread.run(Thread.java:745) [rt.jar:1.7.0_55]

05:57:39,003 ERROR [org.jboss.as.connector.subsystems.datasources.AbstractDataSourceService$AS7DataSourceDeployer] (MSC service thread 1-3) Exception during createSubject()PBOX000016: Access denied: authentication failed: java.lang.SecurityException: PBOX000016: Access denied: authentication failed
          at org.jboss.security.plugins.JBossSecuritySubjectFactory.createSubject(JBossSecuritySubjectFactory.java:84)
          at org.jboss.jca.deployers.common.AbstractDsDeployer$1.run(AbstractDsDeployer.java:1069)
          at org.jboss.jca.deployers.common.AbstractDsDeployer$1.run(AbstractDsDeployer.java:1064)
          at java.security.AccessController.doPrivileged(Native Method) [rt.jar:1.7.0_55]
          at org.jboss.jca.deployers.common.AbstractDsDeployer.createSubject(AbstractDsDeployer.java:1063)
          at org.jboss.jca.deployers.common.AbstractDsDeployer.deployXADataSource(AbstractDsDeployer.java:876)
          at org.jboss.jca.deployers.common.AbstractDsDeployer.createObjectsAndInjectValue(AbstractDsDeployer.java:338)
          at org.jboss.as.connector.subsystems.datasources.AbstractDataSourceService$AS7DataSourceDeployer.deploy(AbstractDataSourceService.java:316)
          at org.jboss.as.connector.subsystems.datasources.AbstractDataSourceService.start(AbstractDataSourceService.java:120)
          at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811)
          at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746)
          at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_55]
          at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_55]
          at java.lang.Thread.run(Thread.java:745) [rt.jar:1.7.0_55]
Log is attached...
I will greatly appreciate any help

linux.server.log