Storing BLOBS in Memo fields

I've been storing JPG files in Access Memo fields and it worked fine for me.
But now I upgraded from D5 to D7 and it's not working OK anymore. I suppose
that D7 is sensitive to some terminator char (#0 or similar) and reads data
only up to the terminator, thus not giving me the entire contents of the
field.

Any ideas how to avoid this?

Thanks

Tomislav Matas