Can anyone help me, Limewire has detected a firewall and can no longer share files. How can I eliminate this problem?

Is your LW properly connected (all green/blue connection bars)? If LW's not connected, try the fixes here.
If LW Will Not Connect

If LW is connected, or if nothing in the thread above helped, please post back with your system details.
System details - help us to help you -> Provide these details when you post!!!