CSS styles in Flash Builder 4

Question

I'm having trouble creating custom info panels with CSS in Flash Builder 4.  I don't get any errors in Flash Builder or the Flash debugger and the styles look exactly as I expect.  When I publish the panel and try to open it in Photoshop CS5, the tab disappears when I click it.  Without CSS the panel runs fine.  It also runs fine with in-line styling.  I have tried both embedded and external CSS.
I understand that Flash Builder 4 uses CSS namespace declarations, but since I am using the default halo theme I shouldn't need a namespace, right?  Even so, I have tried using various namespaces including:
@namespace "http://www.adobe.com/2006/mxml";
@namespace mx "http://www.adobe.com/2006/mxml";
@namespace fi "com.adobe.xmp.components.*";
Do I have to use StyleManager and load the CSS at run time?
snippets:
<fi:XMPForm
xmlns:mx="http://www.adobe.com/2006/mxml"
xmlns:fi="com.adobe.xmp.components.*" width="100%" height="100%" label="XMP_TESTS">
<mx:Style source="test.css"/>
//Form items here
/* CSS file */
.workFormItem
borderColor: #DBD5A5;
borderStyle: solid;
cornerRadius: 5;
textIndent: 5;
.imageFormItem
borderColor: #C7D5F1;
borderStyle: solid;
cornerRadius: 5;
textIndent: 5

Answer 1

I'm also finding that some in-line styles that work in Flex Builder 3 (for info panels run in CS4 and CS5) but don't work in Flash Builder.  Again, these appear to be legal and don't cause an error, they either cause the compile to fail or they compile but the panel won't run in CS5.
Two in-line styles that don't seem to work in fi:XMPTextInputMRU are cornerRadius & themeColor
Perhaps these are conflicts with the halo theme or there is a bug in the XMP FileInfo SDK.  I'm puzzled becasue some styles work and others don't.
For reference, I'm trying to duplicate the styles that I successfully created in my Flex Bulder 3 project (screenshot: http://metadatadeluxe.pbworks.com/w/page/27003617/VRA_beta-screen-shot:-All-Fields)
Thanks for any help you can give.