playframework - Cannot deploy play-tutorial to Heroku -

i trying tutorial said keep having error. tutorial first to-do. (so source same in here)

   [info]   [successful ] org.easytesting#fest-util;1.1.6!fest-util.jar (293ms)    [info] done updating.    [info] compiling 4 scala sources , 3 java sources /tmp/build_3oqhsaxc7iatb/target/scala-2.10/classes...    [error] /tmp/build_3oqhsaxc7iatb/app/controllers/application.java:6: object data not member of package play    [error] import play.data.validation.constraints.*;    [error]        ^    [error] /tmp/build_3oqhsaxc7iatb/app/controllers/application.java:7: object data not member of package play    [error] import play.data.*;    [error]        ^    [error] /tmp/build_3oqhsaxc7iatb/app/models/task.java:5: object db not member of package play    [error] import play.db.ebean.*;    [error]        ^    [error] /tmp/build_3oqhsaxc7iatb/app/models/task.java:6: object data not member of package play    [error] import play.data.validation.constraints.*;    [error]        ^    [error] /tmp/build_3oqhsaxc7iatb/app/models/task.java:8: object persistence not member of package javax    [error] import javax.persistence.*;    [error]        ^    [error] /tmp/build_3oqhsaxc7iatb/app/models/task.java:11: not found: type model    [error] public class task extends model{    [error]                           ^    [error] /tmp/build_3oqhsaxc7iatb/app/views/index.scala.html:6: int not take parameters    [error]  <h1>@tasks.size() task(s)</h1>    [error]                 ^    [error] 7 errors found    [error] (compile:compile) compilation failed    [error] total time: 116 s, completed may 19, 2013 8:37:52 pm 

! failed build app sbt ! heroku push rejected, failed compile play 2.x - java app

ok, seems problem projects/build.scala file, here working version:

import sbt._ import keys._ import play.project._  object applicationbuild extends build {    val appname         = "todolist"   val appversion      = "1.0-snapshot"    val appdependencies = seq(     // add project dependencies here,     javacore,     javajdbc,     javaebean,     "postgresql" % "postgresql" % "9.1-901.jdbc4"   )    val main = play.project(appname, appversion, appdependencies).settings(     // add own project settings here         )  } 

i followed this tutorial , did not understand correctly how set build.scala file.