我最近使用Force.com IDE 时，经常提示密码错误。从Google 中终于发现一个解决方法，分享给大家，以供大家参考。

在Force.com IDE  29.0中，IDE 存储我们开发Org 的密码不是在我们的WorkPlace,而是通过强加密的方式存储在特地的地方.（以前的版本不清楚）

如果一个项目你开发使用的用户修改过密码，或者使用过其他用户开发，他都会有记录，这时他就会有时不知道你使用的哪一个密码。

你只要把他们删除掉，重新建项目就OK了。如果没有删除保存的密码的记录，新建项目还是会出问题。

具体操作步骤请看截图和下文。

以下是问题描述和解决方案原文，供大家参考：

I recently installed the latest version of Eclipse (eclipse-java-kepler-R, 2.0.1.20130919-0803) with the Force.com IDE plugin (29.0.0.201310181333). Everything was working fine until this morning, when it had lost the credentials for the project I was working on. I could re-enter the password and security token, the plugin connected to Salesforce, but as soon as I closed the Force.com IDE settings on the project and re-opened it, the credentials were gone. Logging into Salesforce, and going to the Login History of my account, I saw the plugin connecting just fine. How can I get it to start storing the passwords again?

I found a solution. I had to go into the Eclipse preferences and delete the values in "Secure Storage".

具体操作步骤：

1)   Select the Window/Preferences item.

2)   Go to General/Security/Secure Storage.

3)   Select the Contents tab.

4)   Select Force Projects and then click the Delete button.

After restarting, Force.com IDE was able to save my passwords again.