[Enigmail] gnupg key wrong

[Paul Cartwright]

>When GnuPG is given an email address to select a signing key, it will use the
>first matching key that also has a (sub)key capable of signing. The problem 
>with
>this is that the selected key may not be the one you wished to use.

>The solution is easy, check the other radio button, 'Use specific OpenPGP key
>ID' and then enter the ID for GnuPG to use for signing, eg 0x93C6511A

ok, here is my problem.

I have a key that I even got signed. I am using gnupg on my Debian Linux 
system, and kmail for email.
on my laptop(work stuff) I setup thunderbird & enigmail. My Debian home system 
uses one email address, and my laptop uses a work email address.
Do I just add my work email into my current key? if so, how??
right now somehow I have added my home email onto my laptop, but it doesn't 
like my password, so I must have messed up copying the key, or did I miss a 
specific file?
I know where all the files are on my Debian system, but not on the dark side 
laptop ( XP).
ack, and now it seems I can't even sign a message using kmail! error:
no backends found for listing keys, check your installation.

I do have a signed key, pbckey.. and I can see it with Kgpg.

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Paul Cartwright