OPTION 1) (automatic and instant)
Go to http://logicmastersindia.com/forum/forgot-password.asp
Enter your username and email address
You will receive a code in your inbox (Check spam folder in case your email server marks it as spam)
If the above option does not work (e.g. if you don't receive email in 5 minutes)
OPTION 2) (Manual and slow)
Send an email to logicmasteradmin@gmail.com from your registered email address