Tried to point some hash to your pool but didn't work. Is it VARDIFF?
what the problem you have with vardiff.? diff = 1024 on our pool
Don't know why the rig I rented kept disconnecting. I pointed 255Mh and didn't work. Switched to supernova and worked right away.
hmm. i dont now what the problem. other user work ok... sorry for the inconvenience
Just my 2 cents:
Most probably (99% probability) the problem is in low difficulty offered by the pool. I tested your pool using nicehash 'Pool verificator', and it told me "Pool difficulty too low (provided=32.0, minimum=128.0)". So your pool's starting difficulty is not 1024, but just 32, which is not rejected by high power rigs.
If you want people be able to use rented power on your pool, you need to correct this.
Hope this helps.