New Post: How to use newer version of Microsoft.Practices.EnterpriseLibrary.Common?

That still doesn't answer what versions you're using.

C1 4.3 or 5.0 Beta 1? Hangfire 1.5.3 ?

I can send you a Zip-file with a running C1 4.3 site, running Hangfire 1.5.3 if that can help you.