CAPICOM throwing FileLoadException

[agent-s]

I'm trying to do a foreach loop of each Certificate in a Certificates
collection. Note: This worked perfectly yesterday, and today it
started throwing a bunch of exceptions.

basically C# says that CAPICOM.CertificatesClass.GetEnumerator() is
throwing the exception, saying that "Unverifiable code failed policy
check. blah blah blah"

What is going on here?
heres the code:

foreach(Certificate currentCert in certs)
{
try
{
localMachineStore.Remove(currentCert);
}
catch (System.Exception e)
{
writeToLogFile(e.Message);
}
}