Connecting to database ... Default DB connection failed

All experts,

I have Create schema and tablescapes for example : SAP_PRD 5G unlimited .

after completion sap sourcing installation , i have done successfully dbimport on SAP_PRD schema. but SAP JAVA J3EE Engine is not working from configtool.

I am getting error like :- error occurred while scanning db.msg:error while connecting db.

Connecting to database ... Default DB connection failed

  FATAL: Main class "com.sap.engine.configtool.console.ConsoleConfigTool" cannot

be started:

  FATAL: java.lang.NullPointerException: while trying to invoke the method com.s

ap.engine.configtool.data.ClusterData.getTemplates() of an object loaded from st

atic field com.sap.engine.configtool.console.ConsoleConfigTool.clusterData

        at com.sap.engine.configtool.console.ConsoleConfigTool.loadTemplatesAndI

nstances(ConsoleConfigTool.java:153)

        at com.sap.engine.configtool.console.ConsoleConfigTool.main(ConsoleConfi

gTool.java:1167)

        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.

java:39)

        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces

sorImpl.java:25)

        at java.lang.reflect.Method.invoke(Method.java:597)

        at com.sap.engine.offline.OfflineToolStart.main(OfflineToolStart.java:16

2)

  FATAL: com.sap.engine.offline.OfflineToolStart will abort now with exitcode 2

Program terminated abnormally

Press any key to continue . . .

i have checked database level  JAVA schema and SAP Sourcing schema connected to SID and also i have upgrade configtool and assign all JVM parameters .

Please guide for configtool.

Regards,

Subhash N Bhalekar