hpool-server/hpool-stratum

[MSaaby]

npm install hpool-server
npm install hpool-stratum

node server.js

I get this error:
module.js:340
throw err;
^
Error: Cannot find module 'hpool-stratum/lib/StratumServer.js'
at Function.Module._resolveFilename (module.js:338:15)
at Function.Module._load (module.js:280:25)
at Module.require (module.js:364:17)
at require (module.js:380:17)
at Object. (/home/pi/node_modules/hpool-server/server.js:21:21)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Function.Module.runMain (module.js:497:10)

Renamed hpool-stratum/lib/stratum.js to StratumServer.js

node server.js

I get this error:
/home/pi/node_modules/hpool-stratum/lib/StratumServer.js:46
server.listen(context.config.stratum.port, function () {
^
TypeError: Cannot read property 'stratum' of null
at new module.exports (/home/pi/node_modules/hpool-stratum/lib/StratumServer.js:46:33)
at Object. (/home/pi/node_modules/hpool-server/server.js:43:14)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Function.Module.runMain (module.js:497:10)
at startup (node.js:119:16)
at node.js:906:3

What do I do now?