PrettyPixels on "Help please - Login with query string"

I'm trying to log in by using a query string. For some reason, the URL I'm using simply refreshes to the wp-login.php page and doesn't log me in.

Here is the URL I'm using, obviously with the actual credentials changed. ;) Can you please take a look and let me know what needs to be changed for it to work?

http://myWordpress.com/blogs/wp-login.php&log=myusername&pwd=mypassword&remember_me=forever&redirect_to=http://myWordpress/blogs/wp-admin/&testcookie=1

I appreciate any help you can offer.