problems opening .asc file

[Matt D]

Hey,
i was sent a .asc file as an attachment.  when i try to open it it says
"Couldn't decrypt file: No data"

and on the signature part of another email i get this:

OpenPGP Security Info

Error - signature verification failed

gpg command line and output:
gpg
gpg: Signature made Wed 14 Aug 2013 07:32:07 AM EDT using DSA key ID
xxxxxxxx
gpg: BAD signature from "xxxxxxxxxxx.com>"

however when i do:

gpg --sign-key xxxxxxxx

it tells me it is signed by my key.

What am i doing wrong here?
Thanks!

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Matt D
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