Problem submitting lengthy text to a form. Help!

Hi everyone,

Just like the subject states, Im having trouble submitting lengthy text into a form. Im on a VPS and my post_max_size = 8m and my upload_max_filesize = 2m, which should be able to handle the lengthy text. The text I'm trying to submit is about 5 paragraphs. I have another site on a shared server with the same settings and I have no problems. It's only the VPS giving me a headache. Please help. Thanks!

What is the trouble you are having? What error or warning messages are you seeing if any? What other debugging efforts have you gone through? How much text can you successfully submit? (i.e. at what point does it fail)