camembert

My dayz is up to date with the servers and so is arma 2 but when i load in i get past lobby and my screen stalls on a full load bar with a "0" at the end. and it wont count up. it also doesnt show me in the list of players on the server on dayz commander. plizz help.. Also ive had the problem for a while but its just annoying me now. my dayz has an FPS issue where it runs smoothly but every 2 - 5 seconds or so my FPS will drop to about 5 FPS for 1 - 2 seconds and this is constant.. does anyone know what is causing both these problems. ive tried updating drivers and everything. game runs smoothly in single player but not on dayz. HELP!