What do you mean by flakey.

Not sure but some Internet Service providers do block or filter p2p applications. You have not provided who you use.

Have you properly configured your firewalls to allow LimeWire full access.

Would you please provide the following information.

Firewalls
Modem type & model no.
Router type & model no.
Connection (Dialup,ADSL,DSL,Cable)
Who your ISP is.

Thank you.