Problem in calling an external server URL with in a RFC

Hi experts,

I am facing a problem in calling a URL with in a RFC which in turn is called from any WD JAVA application .

I am using 'HR_URL_CALL_BROWSER' for calling the URL, but i get an exception saying 'NO_BATCH', i even tried using

'CL_GUI_FRONTEND_SERVICES=>EXECUTE' , the result is the same.

The url that i am trying to call is just an aspx page passing some parameters through query string.

If i try to do the same through SE37, the URL gets called successfully.

Plz help.

Regards,

Laxmi.