I noticed you are posting as a guest. But you also have an account on shivtr that is registered with us. If you lost the password, maybe you can find it on your e-mail. If not, then apply to the kinship again and the shivtr will send you another email.
Unfortunatelly you can only sign up for events if you are registered on the website. We have that privacy setting so that random people can't sign up.
Good luck and shout again here if you can't fix the problem.