“HTTP 500 Internal server error” when trying to post

Here is the link to the post http://www.ps3bloggers.com/?page_id=8 .

I can post articles but it is not allowing for me to post the entire thing.

It will not allow for me to add the following to the bottom of the article:
“Disc Media
CD PlayStation CD-ROM, PlayStation 2 CD-ROM, CD-DA, CD-DA (ROM), CD-R, CD-RW, SACD, SACD Hybrid (CD layer), SACD HD, DualDisc, DualDisc (audio side), DualDisc (DVD side)
DVD: PlayStation 2 DVD-ROM, PlayStation 3 DVD-ROM, DVD-Video, DVD-ROM, DVD-R, DVD-RW, DVD+R, DVD+RW
Blu-ray Disc: PlayStation 3 BD-ROM, BD-Video, BD-ROM, BD-R, BD-RE”

However, I can put the letter “A” in about 500 times and it will post. Bu when I try to post the above it gives me an HTTP 500 Internal server error. How can I fix this? There are zero special characters in the above piece of article so it should post without any problems.