How to upgrade : Library for Jasper Connector in Community

I m using ireport 5.6 to create jrxml file .
in bonitasoft jasper report version is 5.0
so it give classdefnotfound exception .

i want to import new jar files of jasper report .
so it can parse 5.6 version jrxml file .

how can i do this ?
its urgent

thanks
Kandarp