EclipseScalaIDE错误中的Scala提升项目

我安装了，它似乎工作正常。因此，现在我正在尝试导入一个提升项目（具体地说，是从中自动生成的提升项目），现在我的工作区出现了四个错误：

value net is not a member of package <root> Boot.scala /rss2lj/src/scala/bootstrap/liftweb line [3..6] Scala Problem

谁能帮我一下吗

UPD：我为基于maven的项目找到了一个解决方案，但我尝试使用的项目不是基于maven的

我得到了答案，但新的错误发生在同一行：

error while loading Helpers, Scala signature Helpers has wrong version 
 expected: 5.0 
 found: 4.1 in /home/gleontiev/workspace/rss2lj/webapp/WEB-INF/lib/ 
lift-util-1.0.jar(net/liftweb/util/Helpers.class)

error while loading LiftRules, Scala signature LiftRules has wrong 
version 
 expected: 5.0 
 found: 4.1 in /home/gleontiev/workspace/rss2lj/webapp/WEB-INF/lib/ 
lift-webkit-1.0.jar(net/liftweb/http/LiftRules.class)

error while loading Loc, Scala signature Loc has wrong version 
 expected: 5.0 
 found: 4.1 in /home/gleontiev/workspace/rss2lj/webapp/WEB-INF/lib/ 
lift-webkit-1.0.jar(net/liftweb/sitemap/Loc.class)

error while loading Menu, Scala signature Menu has wrong version 
 expected: 5.0 
 found: 4.1 in /home/gleontiev/workspace/rss2lj/webapp/WEB-INF/lib/ 
lift-webkit-1.0.jar(net/liftweb/sitemap/Menu.class)

---

问这样的问题最好的地方是在邮件列表上

error while loading Helpers, Scala signature Helpers has wrong version 
 expected: 5.0 
 found: 4.1 in /home/gleontiev/workspace/rss2lj/webapp/WEB-INF/lib/ 
lift-util-1.0.jar(net/liftweb/util/Helpers.class)

error while loading LiftRules, Scala signature LiftRules has wrong 
version 
 expected: 5.0 
 found: 4.1 in /home/gleontiev/workspace/rss2lj/webapp/WEB-INF/lib/ 
lift-webkit-1.0.jar(net/liftweb/http/LiftRules.class)

error while loading Loc, Scala signature Loc has wrong version 
 expected: 5.0 
 found: 4.1 in /home/gleontiev/workspace/rss2lj/webapp/WEB-INF/lib/ 
lift-webkit-1.0.jar(net/liftweb/sitemap/Loc.class)

error while loading Menu, Scala signature Menu has wrong version 
 expected: 5.0 
 found: 4.1 in /home/gleontiev/workspace/rss2lj/webapp/WEB-INF/lib/ 
lift-webkit-1.0.jar(net/liftweb/sitemap/Menu.class)