Is It My Internet Connection Or Something Else??

[blastaman]

For some reason now whenever i play runescape i will take a few steps then when i try to do something a little more complicated in the game it will freeze up then give me the connection lost message and sooner or later kick me off. I dont know what is causing it but it is getting on my nerves can someone help me i asked some friends they told me to go on to high detail but then it just happens quicker usually so please someone help me i dont know whats wrong my computer is practically new.......