How can I write a XnView plugin compatible with SageThumbs?

[Charmy]

Hi,

I've written a XnView plugin that works perfectly fine to view my own image format(.cpic). I named the compiled plugin Xcpic.usr and put it under the plugins folder. I can open my own .cpic files with XnView and it shows perfectly with no problem. However, I do want to view my files on MS File Explorer and I installed SageThumbs. I've read the instructions on Google Code, and I put my Xcpic.usr on "C:\Program files\XnView\PlugIns\" (64-bit SageThumbs on 64-bit Windows 8.1) but it doesn't work. The XnView installation folder is "E:\Program Files (x86)\XnView\" and my plugin Xcpic.usr is already there under the plugins folder. I've tried putting it on "C:\Program Files (x86)\XnView\PlugIns" but it still doesn't work. I've rebooted several times to no avail.

I've checked out SageThumbs Options and put "cpic"(my format extension) in the Custom file types. But my .cpic files only show a windows photo viewer icon and they don't show any thumbnails. There is a SageThumbs on the context menu, but it doesn't show the thumbnail, and when I click on "copy to clipboard" it says:
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SageThumbs 64-bit
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Can't open image file
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OK
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Help please?

[xnview]

For SageThumbs 64bits, you need to build a 64bits plugin