It sounds like the halyard is just a little bit too long.
To keep in under tension you could take a piece of bungee and attach it to the righthand corner of the tramp and attach an SS or plastic eye on the other end and make the halyard run thru there.
On the tramp it will change the layout to more of a rectangle.
Actually.... how do you put images up here???
When you make a post or a reply there is a "File Manager" button under "Post Options".
You can use it to browse to a file on your local harddisk and clink on Add when you are done, repeat to add multiple files.
Images sizes are limited to 100KB.
You can download the XP-ImageResizer to resize images:
http://download.microsoft.com/download/whistler/Install/2/WXP/EN-US/ImageResizerPowertoySetup.exe 
