It won't load in the Line6 version, only Line6 hardware works with that. You'd need RiffWorks standard to use any non-Line6 device (RW Standard supports Line6 as well as others). Here's more details on the differences
http://www.sonomawireworks.com/guide/index.php/Riffworks_Crossgrade. T4 should work with the same devices RW Standard does.
I don't know about the meters, the only thing I can suggest is to make sure you have the input set correctly in the lower left of RiffWorks. There may be some routing you need to do in the Omega as well, I've not used that device to know.
Good luck!
J.J.