Hi
Increasing the buffers will only help to cover short dropouts, if they are longer you must find the reason for it. It can be because of unstable internet connections, problem with a router or just limited bandwidth. For example if somebody else in the house browse a heavy webpage, that session may take all available bandwitdth, causing a drop in the audio. You can also try to connect from a different location to determine in which end you have the problem.
73 de mike