Hi Desertrat,
Wow, glad to see you on here. Result!!
Now, you have had the same problem as I had.
The problem you have is the picture file is too large for the website. It has a maximum of 2048Kb per post up to a maximum of 10 pictures/photo's. ( so all pictures posted must not exceed 2048kb)
What you need to do is resize your pictures before posting and used the resized pictures in your post. I use a photo reduction program called FastStone, which is free to download and use.
What you do, is select an image(s) that you want to use and resize them ( I use 1024 x 600 ) which makes each image around 100kb after resizing.
There are other resizing programs, but this is what I use and it works for me.
Have a look, but don't be afraid to ask for help or advice from any of the other members on the website, if you get stuck.
Great to see you having a go.
Cheers,
Bigkev