[MiKTeX] Yap cmr12 font problems

[daya r. <da...@ta...>]

Hi, 
I have been using MikTex to write papers for publications. I just did a
paper that has to be sent in preprint form, which uses cmr12 fonts. when
I Tex this in two column format that uses cmr10, everything works fine,
but preprint uses cmr12. This is in Win2K and I use Winshell. This is
the most recent MikTex 2.4. Package is Revtex 4.
When I compile (tex it) I get an error like this.
underfull \box(badness5817) in paragraph at line 83-96.
\OT1/cmr/m/n/10.95.
(This is where the title for the paper is, which is in larger font)
After compilation, when I use Yap to see it I get the message "Not all
the fonts could be loaded. See File:Document Properties for details".
When I hit on OK it displays the paper with only subscripts on the title
lumped together showing up.
In the document properties it says
 "cmr12>>not loadable. Double click to see details" 
Double clicking on it I get
"Making PK font
Trying to make PK font cmr12 at 600 dpi
etc etc and at the end
Transcript written on cmr12.log
Metafont failed for some reason.
make pk: metafont failed on "cmr12"
Loading "cmr10" instead."

However, when I make the ps file and use Ghost View to see it everything
looks fine. This problem is only with Yap.
Anyone has any suggestions to solve this problem.
Thanks,
Daya