struts 数据源配置问题 导致TOMCAT5.0.28 启动时的错误

各位，

我的struts-config.xml中数据源的配置是这样的：

<data-sources >

<data-source key="ImpactFactorDB">

<set-property property="description" value="datasource for ImpactFactorSearchSystem" />

<set-property property="driverClass" value="com.microsoft.jdbc.sqlserver.SQLServerDriver" />

<set-property property="url" value="jdbc:microsoft:sqlserver://localhost/ImpactFactor" />

<set-property property="user" value="Nicholas" />

<set-property property="password" value="" />

<set-property property="readOnly" value="false" />

<set-property property="autoCommit" value="true" />

<set-property property="loginTimeout" value="30" />

<set-property property="minCount" value="5" />

<set-property property="maxCount" value="20" />

</data-source>