Mining pool issue needs to be fixed immediately

Since upgrading to ethOS 1.3.3 when I try to connect to our pool using stratum I get the error. "Could not subscribe: code:-3 message:Method not found" We need to be able to connect with new versions of ethOS 1.3.3. I don't know what changed. Did stratum finally standardize? Can the pool be modified to work with stratum now? I did not see anything about stratum in the release notes for 1.3.3. Please apply with "pool" if you can do this.