Display screenshot on Extent report

Hi:

I have implemented Module 20 datadriven Maven framework. I added Extent reports to the project and the reports are working fine.

My requirement is - In the reports I want to display the screenshots captured when error occurs.

What I have done so far is
In TestBase class
public void takeScreenShot(String fileName) throws IOException{
File scrFile = ((TakesScreenshot)driver).getScreenshotAs(OutputType.FILE);
FileUtils.copyFile(scrFile, new File(prop.getProperty("screenShotsPath")+"\\"+fileName+"_"+CustomListener.iteration_number+".jpg"));
}

I am calling this in my test cases like this:
takeScreenShot(this.getClass().getSimpleName()+"_"+CustomListener.iteration_number);

In the ExtentReport class I have:
//test.log(LogStatus.INFO, "Snapshot below: " + test.addScreenCapture("C:\\Workspace\\project\\screenshots\\"+this.getClass().getSimpleName()+"_" +CustomListener.iteration_number.jpg"));

I am not getting any screenshots in the Extent report.

Please help

Thanks