A beginner who cant connect to Frostwire

[jimmy101]

Hi. I'm not a technically minded person, but I'll try and give you as much detail as possible.

I have a Mac OS X 10.4.11
Broadband Connection 4mgbts (I think)
Frostwire 4.17

I have used limewire with no problems before but recently couldn't connect to the network. As a result I downloaded Frostwire but with no success. After I installed the program it trys to connect but comes up with the error message

"frostwire could not detect an internet connection. please check your firewall settings and try to restart frostwire ".

If anyone could help me that would be great but could I please ask if you can take me through it in easy and simple way