mining pool expert needed

Make Mining Pool accept stratum connections from updated ethOS stratum miners. 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 if you're familiar with this.