我正在尝试使用以下更新站点在新的 Eclipse Luna 实例 (4.4.2) 上安装 RadRails 插件：http: //download.aptana.com/tools/radrails/plugin/install/radrails-bundle
但它总是失败并出现以下错误：
无法完成安装，因为找不到一项或多项所需项目。Software being installed: Aptana RadRails 2.0.5.1278709071-79-7D7BFZcLCUQRF2NWAQhRBC1qP (com.aptana.radrails.feature.feature.group 2.0.5.1278709071-79-7D7BFZcLCUQRF2NWAQhRBC1qP) Missing requirement: Aptana Editor Infrastructure 2.0.5.1278523018-8o57z9icbz-hWlJZG (com.aptana .ide.feature.editors.feature.group 2.0.5.1278523018-8o57z9icbz-hWlJZG) 需要 'org.eclipse.update.ui 0.0.0' 但找不到
无法满足依赖关系：来自：Aptana Web Development Tools 2.0.5.1278614541-7D-7O7iRJci-jVhz-KFyoijH (com.aptana.ide.feature.feature.group 2.0.5.1278614541-7D-7O7iRJci-jVhz-KFyoijH) 到：com.aptana .ide.feature.editors.feature.group [2.0.5.1278523018-8o57z9icbz-hWlJZG] 无法满足依赖关系：来自：Aptana RadRails 2.0.5.1278709071-79-7D7BFZcLCUQRF2NWAQhRBC1qP (com.aptana.radrails.feature.feature.79078-5.1278) 79-7D7BFZcLCUQRF2NWAQhRBC1qP）至：com.aptana.ide.feature.feature.group [2.0.5.1278614541-7D-7O7iRJci-jVhz-KFyoijH]
我应该怎么做才能安装 RadRails？