webdynpro application url not running in internet explorer

Hi guys,

this is Ram. My problem is

    I develop a webdynpro application.After generating a URL while testing it, it is not WORKING in internet explorer.it shows an error message

               "INTERNET EXPLORER CANNOT DISPLAY THE WEBPAGE"-----(IN WINDOWS XP)

               "CERTIFICATE ERROR"------(IN WINDOWS 8).

but when i copy the url address and run it on another browser(like google chrome,mozilla firefox) it is perfectly working.

Here my Question is

1)Is there any settings to do for working the url in INTERNET EXPLORER

2)Is it possible to change the default webbrowser while testing the GENERATED URL in webdynpro abap(internet explorer to google chrome)