issues with posting pics

[MK M GOBL]

New to the boards and have some problems when posting pics and will see this message pop up quite often...?

HTTP 400 error

It's not you, it's this link (it appears to be broken)

Try this
•Retype the URL
•Go back to the last page
•Search for the page

and it will not let me post picture, I have already reduced picture size to under the 650kb size maximum...

any ideas?