TYDIRocks 0 Newbie Poster

Hi guys so basically I am dual booting Windows XP and windows 7. And since my windows 7 is 64-Bit with 8 gigs of ram im basically using this for now on so I copied my projects. I copied them over and most seemed fine except for one and it comes up with this warning/error:

Unable to find manifest signing certificate in the certificate store.

How can I fix this? I worked on this project for awhile and I dont want to throw it away...