flexlib:MDICanvas backgroundImage="@Embed(source='/imgFolder/imgFile.png')/ compatability problem

Dear all,
We have a project that doing migration from flex 3 to flex 4. We use flexlib the latest version of
flexlib - 2.5 - flex4.zip.
However we confronted problems that several of attributes that flex 4 doesn't support:
Constraints are listed as follows:
1) <flexlib:MDICanvas backgroundImage="@Embed(source='/imgFolder/imgFile.png')/>
2) <flexlib:MDICanvas backgroundSize="auto"/>
3) <mx:ApplicationControlBar barColor="#000000">
original error message:
====================================================
Description    Resource    Path    Location    Type
The style 'backgroundImage' is only supported by type 'flexlib.mdi.containers.MDICanvas' with the theme(s) 'halo'.    MainView.mxml    /osss/flex_src/hk/gov/labour/osss/view    line 242    Flex Problem
Description    Resource    Path    Location    Type
The style 'backgroundSize' is only supported by type 'flexlib.mdi.containers.MDICanvas' with the theme(s) 'halo'.    MainView.mxml    /osss/flex_src/hk/gov/labour/osss/view    line 242    Flex Problem
Description    Resource    Path    Location    Type
The style 'barColor' is only supported by type 'mx.containers.ApplicationControlBar' with the theme(s) 'halo'.    MainView.mxml    /osss/flex_src/hk/gov/labour/osss/view    line 227    Flex Problem
Regards,
Man Pak Hong, Dave
manpakhong
[email protected]

We find the answer.
The problem is that the project theme is using spark as default. But the MDICanvas use Theme Halo. So that we need to change the theme from Spark to Halo.
Doing this by:
Right-click the Project --> Flex Theme --> Choose Halo from "Adobe Themes - Halo"
Man Pak Hong, Dave
manpakhong
[email protected]

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flexlib:MDICanvas backgroundImage="@Embed(source='/imgFolder/imgFile.png')/ compatability problem

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