Thread problems

I am having problems with my threads. The last few threads I have made, people will post on them, but it wont let me reply back. It also doesn't bump up my thread and it says no one posted, but I can clearly see that someone did post.

 

It would help to provide more information about the error. For example,
- A link to a thread you're having trouble replying to
- The error message you receive when you try to reply

I have seen occasional posts that don't bump the thread or are not acknowledged with the correct last poster, but this is fairly rare, and usually happens when the post is made while the server is having other problems.

 

http://sythe.org/showthread.php?t=1136053

This is the thread I cant reply to. It says I have to wait 30 seconds between posts, but I haven't posted anything. Also, it says it has 0 replies, although it clearly has one.