I have a problem with thumbnail from extensions without an image upload...

[ccsakuweb]

When I upload a file .doc for example, the thumbnail is the random thumbnail here : http://www.paxykochan.net/myart/details.php?image_id=278

But in the gallery the thumbnaild is correct : http://www.paxykochan.net/myart/categories.php?cat_id=35

where is the error? do you have any idea? i donīt know... please.. .help me..

[ccsakuweb]

 I forgot to say that my 4images version is 1.7.3, I have updated my version 1.7.1 to the 1.7.3.
I think that the error comes from before but I did not know. perhaps the best thing would be to unsetup it and to return to install it but I do not want to lose the mods

please.. i need help..