...
> Yea I checked that -
Checked what? Please refrain from top-poasitng - it is most confusing.
>... there is a valid PNG image
According to who or what? What software has led you to
believe the image is 'valid and correct'. Note that to be
any good, a system based image viewer has to be very
robust, and figure ways to overlook, or correct, problems
with 'almost right' images.
>...in the location
> corresponding to the 'filename' string that I give to it
How big is the image (in bytes)? Is it proprietary?
Can you upload that image to your server and
provide the link?
Andrew T.