Dear Srividya Sharma, 
  
I am using FusionCharts v3.1, when compile it gave me unsupported class version error, only then I found out I am using JDK1.3.1_02. 
Do you have exporter JAR for this JDK1.3.1_02?  I can't switch to higher JDK because have to follow the production server JDK version.