tanking

For the first few days after I installed the client it worked fine. Speeds around 500 to 600 kbs. However after that, it completely tanked to around 5 kbs and it won't go back up. What do I do?

someone told me that if our economy keeps tanking that it will. It doesnt make sense to me. The internet is a network of computers all over the world why would it shut down? no bud i usually dont but this got me to wondering about the ISPs could they go out of business and what then? it would...