Hi Levent,
please store the images in one bitmap (*.bmp, *.png or *.gif) containing the image frames one after another. The multi-frame GIF or animated GIF format is not supported (as it is also the case for a couple of graphics tools I tried to investigate your GIF file).
This means, if you have a FrameSize of <250,250> and you want to have 50 images, you can create one bitmap e.g. with 2500x1250 pixel and place one image after another. So you have 5 rows with 10 images per row. Then it should work.
Nevertheless, let me recommend to use only the small digits in the middle of your dashboard as a multi-frame image and draw the gauge by using a Stroked Path.
What do you think?
Best regards,
Manfred.