i have been looking into this further as i have two sites nearing live that this is affecting.
today i installed a fresh site onto my server with a new database and inserted an image this worked.
so one of the sites i am working on has only one page of content at presant i copied the theam away dropped the old db and reinstalled a fresh install and created a new db moved the theme back and uploaded new images this all went well and worked fine. when i went to insert an image from the cms same problem no image shows in mce or on published site.
and for some reason in the _resampled folder images are renamed to StripThumbnail-imagename.jpg, if i edit the image path and add _resampled/StripThumbnail-imagename.jpg to the path i get a thumbnail image, if i move the image to the _resampled folder and edit the image path to _resampled/imagename.jpg the image does not show.