Create your own code Signing Certs

1) Go to the Visual Studio Command prompt and type
Change the text in bold to suit yourself

makecert -sv OperationakPlan.pvk -n "CN=Operational Plan Certificate" OperationalPlan.cer -b 01/01/2010 -e 01/01/2099 -r

2) Then Type
pvk2pfx -pvk OperationaPlan.pvk -spc OperationalPlan.cer -pfx OperationalPlan.pfx

3) Go To Visual Studio to the Signing Tab of the Appilicatin Properties
4) Select the pfk to sign the assembly