Could someone please help me with this banner problem?

[Guest]

Hi there,

 

My problem is when I download certain banner ads some I am able to see but others I can't and are replaced with a small white sheet of paper with a fold at top right and some colored buttons. Someone at my work suggested I could save the file type as JPEG but I only have two options to save to - GIF and BMP. Could JPEG be the problem and if so how do I get it? Or if this is not the problem anyone got an idea what it could be?

 

Any help/advice would be very much appreciated as I'm not really sure about any of this stuff as it's a bit too technical for me!

 

Cheers,

 

Kenny.