SDK Platform Tools component missing - Similar to Android Eve below

Ubuntu Linux 10.04//Eclipse 3.5.2

I'm new to Eclipse and Android. Eclipse is up and running simple Jave apps OK. I moved on to downloading the Android SDK starter package, which seemed to go OK. Ran the SDK manager and downladed Platforms 7,8 & 9. Installed the ADT package in Eclipse.

I've tried to load the SDK path into the Eclipse Preferences, but it won't retain the path. After restart, Elipse says it can't find SDK package. Also,one message said that the (revision?) number of the ADT couldn't be found.

I've reinstalled Eclipse a couple of times, and then gone through the SDK & ADT download procedures a couple of times and am stuck. Any suggestions will be 开发者_开发问答appreciated.

Hertfordkc

Stupid question caused by not thoroughly reading the Android Developers Guide and the tutorials before trying to start a project. Don't know why I didn't get a message about a missing XML file.