Field "Image" to store PDF file

Hello…
In my DB, I use a field type IMAGE to store a PDF file, uploaded in a Form…
This option work fine, for a time, but now i try to download a PDF, and the content of the field not contains the PDF data…
looks like encrypted or compacted
If i try with a JPG image, work fine…
I’m not change the DB or the code.
that could be happening?
Thanks!

it’s strange…
In the table, the corrects fields begins with 0x255
But then a date, begins with 0x2A6 (nm), and i cant decode…
Some help?

Solved. Change database field type to Varbinary(MAX)
I can’t recover the PDF Files stored… but now work…