Some css entries lost after compling

[Alex Luya]

I have a css for FlexTable as following:
.emc-powertable td {
cursor:pointer;
border-color:blue;
border-style:solid;
border-width:1px 1px 1px 1px;
text-align: left;
}

after complied,in firefox,I can not see the border,and in firebug,I
found this css become:

.emc-powertable td {
cursor:pointer;
border-color:blue;
border-style:solid;
text-align: left;
}

Apparently,some css entries lost,so I can not see border of table,but In
IE6,I can see the border,Can anybody help me?
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I am using GWT 1.5.2 xml file is
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<?xml version="1.0" encoding="UTF-8" standalone="no"?><module>

<!-- Inherit the core Web Toolkit stuff. -->
<inherits name="com.google.gwt.user.User"/>
<inherits name="com.google.gwt.i18n.I18N"/>

<!-- Specify the app entry point class. -->
<entry-point class="com.tsolution.emc.client.EMC"/>
<inherits name="com.google.gwt.user.theme.standard.Standard"/>

<!-- Add gwt-log support, default level `DEBUG` -->
<inherits name="com.allen_sauer.gwt.log.gwt-log-DEBUG"/>
<extend-property name="log_level" values="DEBUG"/>
<set-property name="log_DivLogger" value="DISABLED"/>
<!-- <set-property name="log_ConsoleLogger" value="ENABLED" />-->
<set-property name="log_RemoteLogger" value="ENABLED"/>
<servlet class="com.tsolution.emc.server.ServicesImpl"
path="/Services"/>
<inherits name="com.google.gwt.widgetideas.WidgetIdeas"/>
<inherits name="com.google.gwt.widgetideas.ScrollTable"/>
<inherits name="org.zenika.widget.DatePickerModule"/>

<stylesheet src="css/ScrollTableDemo.css"/>
</module>