请教ADT安装，忙了一下午了。。。。急急

在eclipse中安装android时出现下面问题： 各位大侠 应该怎么解决啊？
Software being installed: Android Traceview 21.0.0.v201210310015-519525 (com.android.ide.eclipse.traceview.feature.group 21.0.0.v201210310015-519525)
Software currently installed: Eclipse IDE for PHP Developers 1.3.0.20100617-0520 (epp.package.php 1.3.0.20100617-0520)  
Only one of the following can be installed at once:      
Eclipse UI 3.6.1.M20100826-1330 (org.eclipse.ui 3.6.1.M20100826-1330)     
Eclipse UI 3.6.2.M20110203-1100 (org.eclipse.ui 3.6.2.M20110203-1100)     
Eclipse UI 3.6.0.I20100603-1100 (org.eclipse.ui 3.6.0.I20100603-1100)  
 Cannot satisfy dependency:     
From: Android Traceview 21.0.0.v201210310015-519525 (com.android.ide.eclipse.traceview.feature.group 21.0.0.v201210310015-519525)     
To: org.eclipse.ui 3.6.2   Cannot satisfy dependency:     
From: Eclipse IDE for PHP Developers 1.3.0.20100617-0520 (epp.package.php 1.3.0.20100617-0520)     
To: org.eclipse.epp.package.php.feature.feature.group [1.3.0.20100617-0520]   
Cannot satisfy dependency:     
From: EPP PHP Feature 1.3.0.20100617-0520 (org.eclipse.epp.package.php.feature.feature.group 1.3.0.20100617-0520)     
To: org.eclipse.platform.feature.group [3.6.0.v20100602-9gF78GpqFt6trOGhL60z0oEx3fz-JKNwxPY]   
Cannot satisfy dependency:     
From: Eclipse Platform 3.6.0.v20100602-9gF78GpqFt6trOGhL60z0oEx3fz-JKNwxPY (org.eclipse.platform.feature.group 3.6.0.v20100602-9gF78GpqFt6trOGhL60z0oEx3fz-JKNwxPY)     To: org.eclipse.rcp.feature.group [3.6.0.v20100519-9OArFKvFtsd7WLUKh-DcYTS]  
 Cannot satisfy dependency:     
From: Eclipse RCP 3.6.0.v20100519-9OArFKvFtsd7WLUKh-DcYTS (org.eclipse.rcp.feature.group 3.6.0.v20100519-9OArFKvFtsd7WLUKh-DcYTS)     
To: org.eclipse.ui [3.6.0.I20100603-1100]