Acrobat X ActiveX Control problem

Hello,
we embed Acrobat Reader X in our application to view PDF Files. We use the Acrobat Reader Active X Control for that. Recently we started to get report about problems with the plugin and do not know what to search for. It seems that when used as ActiceX Control, Acrobat Reader is not loading the document correctly which makes find operations or signature checks hang forever. Also no thumbnails are created in Thumbnails View (just an empty white page). Opening the same file in reader directly works OK with no issues. Any ideas what to look for? The same code works perfectly with older versions of Acrobat ActiveX Control.
Here some screenshots from a sample application we created to test the issue:
1) No Thumbnails - only white pages
2) No signature - although the document is signed
3) When pressing 'Verify All' on the signatures panel - the following message appears (it basically states: "for this operation, the whole document needs to be downloaded") - but the document is local and has been loaded. Pressing OK makes it hang forever.
A similar problem happens when using CTRL+F - i can enter a search, but then it hangs forever saying that page 1 of x is searched. Probably the same issues that the Active X controls thinks it needs to download something.
Here the code we use to create the control and load the file:
m_pPdf = new CAcroAXDocShim;
     CRect r; GetClientRect(r); r.bottom -= 50;
     if (!m_pPdf->Create(_T("AdobeWnd"), WS_CHILD | WS_VISIBLE, r, this, 12345))
          delete m_pPdf;
          m_pPdf = NULL;
     m_pPdf->LoadFile (_T("d:\\temp\\Thea7b2.pdf"));
Anyone experienced something similar?
Any help or feedback would be greatly appeciated.
Thanks,
Wolfgang

Same problem here with 10.1.0.
No new information about a fix/update/solution????
Regards,
Andreas

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