I am using Math Type Tool.
As we save it .it save as a *.gif image.
As there is many Math type images in a page.
So sometimes mathtype does not displayed.
Is there any solution to this....
The solution might be to investigate the many math filters available in Moodle. They look through the text you write in Moodle and pick out "math" and convert it into notation.
More details can be found here: http://docs.moodle.org/en/Mathematics
Hope this helps,
One possible and common reason is syntax itself - all distributions of latex do not use same syntax and what works in mimetex does not always work in TexLive/teTeX etc and vice versa.
And for example wiki is a special case where you may need to disable CamelCase to render all images and for example square bracket tags always fail in wiki if you add latex tags.
You can also save problematic images to moodledata as normal images (no matter what math editor you take them from and add those eguations with image plugin - or use external latex renderer...