[birt-report-designer-dev] !! Java data source in BIRT 2.2 !!

["Kranti K K Parisa [GetSet-India]" <kranti.parisa@xxxxxxxxx>]

Hi,

I am trying to define a java class which will give a vector to report design file to display the results.
I did this BIRT2.1  but if I try to use the same datasource in 2.2 getting errors 

org.eclipse.birt.report.engine.api.EngineException
: There are errors evaluating script "someClass=new Packages.com.reports.LoanStatReportDB();details=someClass.getEmpLoanStatistics_new(255271122,params["department"],params["location"],params["uid"]);totalrows=
details.size();currentrow=0;":{1}.


which means it might not be able to reach my java classes. 
please suggest about the paths where i need to place the rptdesign files to pick the class files from the package 
com.reports? which is there in WEB-INF/Classes

or anything else needs to be checked?