Go to C:/NGL3/apache-tomcat-6.0.32/webapps/desktop/NewGenLibDesktopFiles/SystemFiles
Open postgres-ds.xml with wordpad
If you find something like this
jdbc:postgresql://localhost:5432/SIT
Change it to
jdbc:postgresql://<ServerIP>:5432/SIT
check the database name, user name and password.
if you are using database name newgenlib, replace SIT with newgenlib and simillarly update username and password also.
NGL Forums Link:
http://newgenlib.70.s1.nabble.com/Website:
http://www.verussolutions.biz/
NewGenLib Open Source Support
Verus Solutions Private Limited
www.verussolutions.biz