Not able to connect to DB from workbench after changing the root password through command line (no replies)

I'm able to change the root password through command line. After that I'm not able to connect to the database from work bench. It's throwing the error message "Failed to connect to MySQL at xx.xx.xx.xx:abcd with the user root & Authentication plugin 'mysql_old_password' cannot be loaded: The specific module could not be found".

MySQL Server version: 5.5
Workbench version: 6.3.6

Please help me. Thanks!