Hmmm.... had exactly same connections. Checked dozens of times. Turns out theres an amp problem .... took amp apart and it works with amp in bits. Slight electrical hazard but there is now sound. Just got to figure exactly whats wrong with the amp now ...
Using the standard 4CM template, if the FX Loop block is off, there is output from the amp speaker. When the FX loop block is engaged, there is no output from the speaker. Mix is 100%
Any ideas?