Unable to sign messages with gpg

[David Vinnicombe <dammit20@xxxxxxxxxx>]

  Hi,
  
  I am trying to use gpg with mutt.
  When i try to sign an email with S-s, i get the following error
  
  Can't sign: No key specified. Use Sign As.
  
  When i try using Sign as S-a, i get the following error
  
  /.index: No such file or directory (errno = 2)
  
  I can use gpg from the command line to sign and encrypt documents
  its only a problem in mutt.
  
  Here are the entrys from my .muttrc file
  set pgp_sign_command="/usr/bin/gpg    --no-verbose --batch --quiet   --outpu  
      t - --passphrase-fd 0 --armor --detach-sign --textmode %?a?-u %a? %f"
  et pgp_clearsign_command="/usr/bin/gpg   --charset utf-8 --no-verbose --bat   
     ch --quiet   --output - --passphrase-fd 0 --armor --textmode --clearsign   
  %?a    ?-u %a? %f"
  
  TIA
  David