password reset on wordpress.com

hi,

unfortunately I’ve lost my password to my weblog on wordpress.com.

When I request a new password I always get a “password reset”-email.

But after klicking on the “password reset”-link I get the error message
“Sorry, that key does not appear to be valid.”

How could a key I received only a few seconds before be not valid?

Could someone from “wordpress.com-support” help me, please?

Thanks in advance!

Volker