Only thing I can see here is that the final closing bracket "}" is missing in your config file. Else I am able to mine with that config file as you can see right now in your dashboard (4x 580).
Setup time indeed takes a while (this is time to set up the GPU code for all GPUs and to establish the fee connection in background), especially on AMD (the compiler needs longer to compile there), but usually it should mine.

If your problems persist after adding "}", then can you try running
from command line to see if it is hashing at all? If yes it is likely some connection attempt of your miner gets blocked so it does not get pass the initial connection phase.



First of all thanks
I will have a look into that. Usually my back-end gets more and more flexible recently (i.e. AION needed a different stratum protocol, so I am now able to handle this). But I have to admit that new algorithms are currently not top priority - rather working on making the existing faster and the back-end more stable on multi GPU and less CPU time consuming. Hope to come along with first news regarding that soon