Error Nagmin (2) - Incorrect administration username or password

Installing Nagmin module through webmin. When i click on "NagMIN Network Monitoring" under servers, i get mysql login screen, even though my mysql password is correct, it gives me an error like
Login failed : Incorrect administration username or password I tried changing mysql password, tried passwords, but still i am not getting nagmin page. I am 100% sure that my mysql password is correct.

Solution

go into the

a. module config for Nagmin
b. In the system configuration section put the username/password