Exchange 2010 OWA page BLANK?

Just met an issue at my client place whereby the OWA page is not displayed. From the event log, it clearly stated some files in the OWA themes folder is missing. Therefore, i copy and replace the entire theme folder from the other CAS server. I was thought this should be fixing the issue and YEAH i can finish my work. Who knows when tried to launch the OWA page, it show BLANK just like below...

OMG, where is the login page gone? after google-ing a while, finally get the hint from an article posted by  

 Peter Daalmans (http://www.msexchangeblog.nl/2010/05/11/blank-page-in-owa-fix-for-exchange-2010/) and follow the way he recommended, which is run the updatecas.ps1 script. The script can be found in C:\Program Files\Microsoft\Exchange Server\V14\Bin.

I opened the Exchange PowerShell and navigate to the path.

After i hit the enter button, the script running and fixed the blank OWA page.

TA.. DA... the lovely OWA login page is able to display again.. :)