help how to upload pics

been here for two hours trying to uploads pics. keeps coming up red X. can anybody help me. Attachments wont work or the insert image. what am i doing wrong.

https://www.rollitup.org/newbie-central/94073-how-start-thread-post-pics.html

You obviously know the first part, but if that doesn't help you, I don't know what you're doing wrong.

thanks alot i got it now. pics to big have to resize. to tired tonight be back tomorrow. but thanks again