i dont have basic permissions

I'm having trouble when I post topics, it is necessary to post links scan for viruses and photos , but when I try to post the site says I'm not allowed
I'm in an endless cycle , I try to do everything right but the forum does not, try to explain in posts and post the broken links and scans with observations. but still remove my post so much work to do, please give me a solution for me to be allowed to post links of files virus scans and photos that the website requires , but not allows
ty for the attention!
and I hope they can help me to add something to the forum
sry about my bad english