getting routing to work

He's using Modules.

Who created the modules and what version are they?

If they are modules created by @Wiredesignz then you need to download
the CI ver 3 of them from below.

Modular Extensions - HMVC

Yes, we are using modules. 
Initially, I did download and update the files in core and third_party. 
I re-did that now and my application is progressing further. I must not have copied the files correctly the first time

thanks
Krish