I have been trying to pool mine with Claymore, but It won't accept an address starting with "ir", such as ir49TFZzxPB3KG5iqsVjoj3ZRj8JuQA3M1FgqTnrW8GQ5VpAsWXD6rYGL1mB6CBmjfGcVAGgzVH3o9o
rcJnbdmiR2j4JReUhs
The miner will accept 49TFZzxPB3KG5iqsVjoj3ZRj8JuQA3M1FgqTnrW8GQ5VpAsWXD6rYGL1mB6CBmjfGcVAGgzVH3o9orc
JnbdmiR2j4JReUhs, but that does not work with the pool it seems. Catch 22 :-) The error I get:
Error in server response
: {"id":1,"jsonrpc":"2.0","error":{"code":-1,"message":"invalidaddressusedforlogin"}}
BTW: I did not have much luck mining my iridium sunglasses, but the CPU miner worked well

Make sure you're not using a WorkerID, this pool software doesn't support it.