Need to modify .png file in Photoshop CS2 ?

[Dwij]

I have been looking for .png file, and when I tried to open it in photoshop CS2, it opened but everything is locked down...
I cannot create a new layer, I can not duplicate the existing layer... i.e. it is not allowing me to modify the file

The only modes that it allows are threshold and dissolve when I place a shape on it anyway and try to fill it.

anybody knows how can I modify this file?

[Glenny]

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[JonathanD]

That is really strange.

I usually work in .png and only use CS2.

Have you tried saving a copy of the image either under a different name or as a different file format?.... check

[Macarenas]

There might be some form of corruption or the programme that made the file didn't quite follow the standard and made a funky png.

check whether it works like a gif? indexed colour... try changing color mode to rgb