Server error 500

Hola me sucede algo muy curioso, desde dos equipos no tengo problemas, pero al subir una imagen a la coleccion de imagenes del perfil en dolphi pero desde varios equipos me sale error 500 y no hace la subida, alguien sabe a que puede ser debido esto.

Muchas gracias de antemano

maybe permissions issue or problem with .htaccess

also check your php.ini; post_max_size, memory_limit & upload_max_filesize

thanks I'll check but the strange thing is that it does not in all computers. 

the same image in the same profile from a computer does well and from other fails. 

could be a trojan on these computers?

You are only getting the 500 Server Errors when using particular computers ?

Maybe it's the case that the error is only happening randomly and making you think it's only working ok on certain computers.

The error is being generated by the web server (the server your site is on) ... Have you checked error logs when this happens? If not then I suggest you check and report back!

ok, i will check because now it woks sometimes well and others not

I have the feeling that the problem is on the server as you said.

thank you very much for your interest and your help.