Front panel freezes using custom XControl

So here's the situation: I wrote an XControl using an external library (camera control functions). The control works as it should work. So I use it in a VI and save this file. Reopening the file causes the front panel to freeze. Why? When I restart labview after it ultimately crashed and place the xcontrol in a new VI it works like a charm again - but saving and reopening it leads to freeze and crash again. In an attempt to debug I deleted all the external VIs from my XControl, believing this to be the problem. Its completely empty now, but still the freezing and crashing. What could be the problem?
Kai

Thank you for your input! I appreciate it very much.
To Chris:
1) Version 12, 32 Bit
2) Here is my init vi:
As you can see, this is still default. I have not changed a thing. Maybe I should?
3) This could be the case! How can I prevent this, if it is the case? Other XControls work fine. I will try a minimal experiment.
To Altenbach: I tried to follow the instructions. Heres my facade timeout. Maybe the need to be more in there:
One last thing. When loading the facade.vi it told me the following:
Vi was expected under "C:\Program Files\Andor SOLIS\Drivers\Examples\LabVIEW\System Files\user.lib\atmcd32d_internal.llb\Error Code Handler.vi", but was loaded from "Z:\Kai\xcamera\MicroscopeControlPanel_64bit_06042012_newroomPalmSet Folder\Program Files\National Instruments\LabVIEW 2010\user.lib\atmcd64d_internal.llb\Error Code Handler.vi"
The first is the local machine, the second is an (access restricted) external drive. How can you EXPECT a source at one place, but load it from another? I will try to change that....it is definitely a possible error source.
Thank you!

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The attachement contains the image of the front panel. The picture shows child vis loaded using subpanel . In this VI i have tab with 5 pages, the pages are controlled using Runt time menu. The picture shown is from the first page of the tab. Now i have a situation we similar child vis are loaded in all pages, it works until fine few minutes, later the front panel freezes compeletly. How to solve this problem?
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Front panel.jpg ‏480 KB

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query.vi ‏49 KB
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"Jim Campbell" wrote in message
news:506500000008000000AF4E0000-1023576873000@exchange.ni.com...
> The problem is twofold: 1) how can programmatically read a transparent
> image (i.e. image with transparent background) and 2) how can I
> programmatically position and size that ima
ge onto a VI front panel.
> The best luck I had with item 2 was with a boolean custom control with
> an imported image. However, this control does not have a programmatic
> method for importing an image, so the image had to be manually
> cut&pasted into the custom control.

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Front panel freezes using custom XControl

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