By moving i died with my avatar

Thats not funny, i am an owner of a sim, premium account, so i have payed a lot here in sl. and get my sim not ready.....
But my avatar is crash, wenn i move him. no response from second life.....5 times 10 times! 1 - 2 hours to try, to come in, that is terrible, i am very frusted
that goes since some days!

i have deleted sl, sestart, have a one year old pc amd Athlon (64Pro)3400+
2,21 GHZ, 1.00 GB RAM geforce 6600


What can i do???????????

Please please HELP ME!

and i want to make rl workshops for biz in germany...but with this surroundings i cant make a rl-preasentation..it is a pitty, that i cannt move on my one sim, without crash, wenn 2 poeple are on my sim Dianthus island, i dont understnad this. i cleanded my computer restatede...puh
i have no idea more

What is your network connection? Are you connected to your ISP directly with cable/ethernet, or have a router between you and the ISP? Do you connect via wireless to the router?