mod_jk is causing failure in formbased authentication in JBoss AS7.1.1 Finalwe

I tried JBoss AS7.1.1 Final and used a FormBased Security Application.

Once the user enters correct credentials the URL Changes to "http://localhost/FormBasedAuth1/protected/j_security_check" And which is displaying BLANK page. ideally this url is not even supposed to be visible to the user.

It is happening only when i am using APACHE web Server in front of JBoss AS7.1.1 with mod_jk. (If i dont use mod_jk then the application works fine.)

After seeing the BLANK page ( "http://localhost/FormBasedAuth1/protected/j_security_check" ) The redirection is not happening for the secured resource automatically . I have to open a separete TAB in the same browser to see the secured resource. Which means the authentication was successful but the automatic redirection did not happen which caused BLANK page to appear on the browser after the successful authentication.