Login randomly not working!

Hi,

When I try and log into http://www.churchfields-farm.co.uk/blog/wp-login.php? I get lots of errors all of a sudden. Nothing has recently been changed in the code and I have no idea what is going on. The errors that appear when the ‘login’ button is hit are:

Warning: Unexpected character in input: '' (ASCII=1) state=1 in /vhost/vhost2/c/h/u/churchfields-farm.co.uk/www/blog/wp-content/plugins/akismet/.readme.old.php(1) : runtime-created function on line 1

Parse error: parse error in /vhost/vhost2/c/h/u/churchfields-farm.co.uk/www/blog/wp-content/plugins/akismet/.readme.old.php(1) : runtime-created function on line 1

Fatal error: Call to undefined function: () in /vhost/vhost2/c/h/u/churchfields-farm.co.uk/www/blog/wp-content/plugins/akismet/.readme.old.php on line 1

I am very grateful for any help

Dave