If we submit register and forgot password form it display blank screen. But refreshing the page submit the data and display success screen.Could not understand what is the problem? please help!
A blank screen can be caused by two potentials. Most likely there are other reasons. But these are the most common:
PHP fatal error. check your webserver error logs. Where these are located is highly dependent on your server setup.
another common reason is that there are no layout handles configured in xml to deal with the controller action.
I am leaning towards the first in your case.
You can also try the following:
SSH to your server. Cd to magento-root/var/log folder. Issue command : tail -f *.log
This will watch all log files in that folder and display any changes that happen, as they happen.
Do the noted actions that causes blank screen.
It may help to include the web server logs in the tail.
Hope that shows you something.