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Image Button displays vary between computers

I have an image dynamically created. An image button is then created
using this image. The problem is that it shows up perfectly on my
machine, but on others it doesn't.
The image is created by making the entire image transparent then
drawing an shape (eg a circle) using a graphics object. It It is then
saved with extension .png to hold on to the transparency.
An image button is then created and linked to this image.
The image button works on my machine - just the shape appears as the
imagebutton. On another machine the transparency does not work and the
whole area around the shape appears white.
Any ideas as to why this might be? Thanks in advance

Nov 29 '06 #1
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