Can't start again ALM service after stop it

I installed trial version of HP QC 11.0. After installation ALM service runs ok, I can use Site Administrator, create new user and project. But after stopping ALM service I can't start it again. In system event log I see error The HP Application Lifecycle Management service terminated unexpectedly after try of 开发者_如何转开发start.

Application & web server: JBoss (installed by default during installation of HP QC)

OS: Windows server 2008 SP2

Database server: MS SQL 2008 SP1

I had trouble with log on credentials. I went into the component services and changed the username/password and voila (stupid security team forcing updated passwords).

Running HP ALM 12.02, MS Server 2012 and Oracle on the back.