FluffyTailsForever

Can anyone help me with this? I've been using the signature second life viewer and my internet is great, but it keeps lagging so badly that it freezes my screen completely and if i go too far or just a tiny bit pieces of my avatar keep disappearing until i get very close to them then their back but it really gets annoying though. If anyone can help me with this please do i really enjoy Second life i really do but this thing that keeps happening bugs me. ^^'