How come I can't load up some websites?

[Quasars]

I'm new to this, but I was wondering: How come I can't load up some websites? When I try to, I get an image just like this one below:

One site I've been trying to access is Chatango.com. My friend has the same model Nokia as I do, yet he can access the website. I was wondering if it's something on my end. Can someone help me with this?

 

[stmav]

Might have something to do with flash player. The chatbox on the left of the page at chatango requires it.