1. Check if you have all the database connectors installed
On my case, I did not have the MySQL connector installed (com.mysql.jdbc.driver)
1.1. Download Connector
This connector can be downloaded from the official MySQL website
http://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-5.1.25.zip/from/http://cdn.mysql.com/
1.2. Copy Connector to Following Folder
/opt/jasperreports-server-cp-5.1.0/apache-tomcat/webapps/jasperserver/WEB-INF/lib
1.3. Confiure JasperServer's DataSource
1.3.1. For SugarCRM
Database Type: JDBC Data Source
JDBC Driver (required): com.mysql.jdbc.Driver
URL (required): jdbc:mysql://192.168.1.1/(Database_Name)
1.3.2. For OpenBravo