The pool already suggests some miners. Please make sure the miner you use is for the algorithm / coin you actually try to mine.
What hardware are you using to mine? It appears not to see any devices (CPU, GPU, Asic). What does it say when it first starts? That would be where I would expect it to state what hardware it had discovered.
There are so many versions of cgminer written for so many different devices and algorithms, without knowing what you are trying to use and what your command line looks like you really haven't provided enough info to see what the issue is.
Radeon r7 350
Use google:
radeon r7 350 cgminer
https://www.overclock.net/forum/18042-distributed-computing-general/1461916-tutorial-ultimate-guide-tweaking-amd-cgminer-3-7-2-kalroth-edition-sgminer-instructions-included-aswell-get-most-hash-out-your-gpu.html
good luck!