Hello, first time user, going crazy(LimeWire will not open because it says I need to install Java but Java is installed.)

[skywith]

LimeWire will not open because it says I need to install Java but Java is installed. How do I get Limewire to "see" and use the Java? When i first downloaded LW (latest basic version) it hung up and I got an error message saying that Windows had blocked the download of Java because there was no "signature". When I pressed OK (the only option), I got message saying LW would continue to download and I would have to download Java separately. I downloaded and installed Java 6 separately, and successfully, but when I click on the desktop LW icon to load it I still get the same error message saying that LW will not start until I download Java. I am running Windows 7 and either Internet Explorer or Mozilla Firefox. I say either one because I actually could not download the Java Runtime Environment app using Firefox because I kept getting the above mentioned error message saying Windows had blocked the file because it wasn't signed. There was no option to go ahead and download it anyway. But internet explorer 64 bit did allow me to download and install it.