Need some Re-amping help! Planned to re-amp a head directly and apply impulses later

[andymue]

Same went for quitting Logic, which makes me wonder if it's a routing problem with my gear after all, since this still happens even if I mic' it up. Or is something I did with the DAW off. (I routed the DI track to output 3-4, and the output for where the amp should go is on the default Stereo out 1-2).

How was the exact setup in this case (no DAW and mic)?
What are those outputs 1-2 / 3-4?
Are they the outputs that the Roland interface presents to your computer? If so, where are they actually routed to (the Roland only has 1 pair of physical outputs...)?