Input value won't save

[Waleed]

So I inserted the XThreads field manually. It works fine and appears in the post.

However the value you put in doesn't stay in the textbox. If there's an error, like your message isn't long enough, the XThreads field(s) gets erased. If I make a post and click edit, the XThreads value also isn't there.

Here's the code in newthread:
I've also tried value="{$Global[xthreads....blah]}"