wine users - Feb 2012 - [1.4rc4][LinuxMint12KDE64Bit]-PPA-"public key is not available"?

[1.4rc4][LinuxMint12KDE64Bit]-PPA-"public key is not available"?

Hi,

Running current Wine version 1.4 RC #4
on LinuxMint 12 KDE 64Bit OS.

I added the Wine PPA to my "Software Sources",
but now "Update Manager" constantly complains:
"The following signatures couldn't be verified because the public key
is
not available" ?

How do I fix the above error?

Thanks!

Jesse