Can't access website outside local when doing .webtests

Question

Alright I'm trying to set up .webtest for doing load/stress tests at our company and it can do all the company's local DEV/QA test servers just fine... but they try accessing outside resources / websites and they don't work/fail.... I can't seem to figure out why they don't work so i just delete those lines, but that won't simulate real load tests if they fail to load everything and are unable to simulate real world access of our websites.

Like i said it access our local stuff just fine but not anything else...

I use visual studio 2010 ultimate and the project type is under TEST and you make .webtest and then make .loadtest to run your scripts using your .webtest to simulate 250+ users at a time

If anyone can help me out that would be great.... Was thinking it might be something to do with how the company handles there gateway to the outside or something... sorry not much of a network guy and have no idea how i would ask the question to find out...