Firefox refused shutdown while preparing a profile

Hi,

I am new to Selenium Automation testing.

I have installed jre1.5,Firefox,SeleniumIde,SeleniumRC and Eclipse in my system.

I created a sample Junit script from SeleniumIDE and i created a java project in Eclipse and i kept Junit file in that project and i have run the selenium-server.jar in command prompt to start the selenium server.

Finally i run the junit testcase in my Ecilpse it has given Exception in command prompt saying Firefox refused shutdown while preparing a profile.

Can any please help me to reslove this issue?

Thanks in advance.