Java Programming

Hi all,
I have a program that needs to call an external program to create some reports. I then take these reports and analyze them.
After some reading i ended up using the Runtime.getRuntime().exec() command but this turns out to be realy slow. It can take up de 1 minute before the report is created.

I dont think the other application is the problem because if i manualy launch it (double clicking on it) the reports are created instantaneously.

Here is what my code looks like if it can help

try {
//							execute the parser.
								System.out.println("Start of execution on StandAlone Parser.......");
									Runtime.getRuntime().exec("run.bat");
								System.out.println("........End of execution of StandAlone Parser");								
							} catch (IOException e1) {
								e1.printStackTrace();
							}	

So what is it i'm doing wrong?

Thanks for your help
Alex