Digital signature not visible

For 4 months the visible signature worked perfect.
But today when I make a visible signature it is not visible.
It seems to be kind of periodic:
I tried one PDF document, and the visible signature was not visible
Then I tried with another document, and the first time the signature was visible.
When I tried more times on the original second document, the signature was every time invisible.
I use Windows 7, 32 bit, and Adobe Acrobat XI 11.0.10.
Regards Finn

I use digital signature with certificate.
I don't know why I got the idea that the signature was there, but invisible.
I can now see that I still have the possibility to sign the document where the signature is "invisible", this indicates of course that there is no signature.
And there is no signatures in the Signature panel.
However, this is what I see:
I press the icon "Digitally sign document"
I drag with the mouse to select the area for the signature
In the dialog box "Sign document" I choose reason, and click "Sign"
I choose a name for the signed document
I give the code for the certificate(at this time the signature is visible on the document)
After this there is no signature but the ducument was saved with the new file name
I don't get any error mesages during this
But in the dialog box "Sign document" I now tried to press the "Review" button
and I get the message:
Report code          Description
2007                    Page content may silently change
1001                    Comment or form field may silently change
1002                    Comment or form field may silently change
Does this information help?

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Hi,
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mrtoner wrote:
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Classification: For internal use only
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kenny0_3 wrote:
Hope someone can help
I bought the 3GS iPhone 32gb today and went to register on my PC and when connected to the uSB ports it was detected as a camera and only gives me the option of Photo Shop etc
It is also visible in 'My Computer' as a camera
This is normal; it IS a digital camera, and this is how you get photos off it.
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The Iphone works normally on another PC but obviously I want it to sync to my PC and Music
Latest version of Itunes installed
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