Ok, back to business, verify your perl path/version from within the cpanplus shell, and dump your cpanplus configuration and version information, that would be my step one

The three main problems I see here are (quoting from log above):

And what have you tried to resolve these problems you perceive?

How about you try some of the tips/tricks you've been provided with so far?

Do you remember what these tips/tricks are (hint, stuff I suggested)?

What to do?

I don't remember if I've suggested it before, but think about giving up , seriously :|

Locate a live human with experience in these issue , then using whatever means necessary persuade said human to walk to your computer and set it up and resolve everything for you

You know why I suggest this? Because Win7programs/Dwimperl/cpanplus seems kind of odd for an citrusperl installation

That combined with this error message Module 'DateTime' needs perl version '5.008001', but you only have version '5.16.3' -- can not proceed also suggests you're running some antique CPANPLUS version, something from 2010