Help please with ms access & bitmaps

[Bob C]

I store all my Australian aircraft registration information in an
Access Database and have a form option which includes space for an
image to be embedded in the page.

I first scan and save my print photos into .jpg then downsize them to
400px X 266px and save the downsized images as .bmp which I then
insert into the Database page. Has been working like a dream for years
with close to 1000 images inserted.

However, a few months ago our old computer died and was replaced. Since
then I have been unable to get the .bmp function to work properly. I
still scan my photos in the usual way and downsize them and save as
400px X 266px .bmp images.

But when I go to insert an image into the form, it appears as a tiny
image in the space, rather than a 400px X 266px image filling the space.

I've asked several people for help but none have been able to and the Help
page on Access and Bitmaps doesn't seem much use (if I'm asking the
right questions).

Could anyone offer any suggestions please ?

All that appears different is the .BMP extension for say, Westwind VH-AJG,
appears as AJG.BMP - Multi Pass Viewer. The icon is blue which it never
was before and I don't think "Multi Pass Viewer" was there either.

Are they clues ?

Any help greatly appreciated.