ehhh the problem is solved finally, ummm don't know what to say.
it was because i enter name : user password : user
that's why it doesn't give me some option in the main page of the router.
and when i enter name : admin password : admin i have all options.
so i could get my connection back..
thanx a lot for your help, sometime the solution is stupid but here we learn from little things
thanx again for your help it was nice from you