I know its been asked 50,000 times, and I've read every one and none of them seem to answer my question

Im trying to get my logo on instead of the Zen one

I've followed the instructions in here:

https://www.zen-cart.com/tutorials/i...hp?article=125

And now all I get on my site is a small box with a red cross in it

Im assuming that px is pixel and ive checked and double checked the pixel size for my logo and no good

Anyone tell me exactly what I have done wrong

btw my site is here

www.stormfairy.co.uk