I recently uploaded a site which include the tinymcpuk that contains tiny_mce. During the off line testing, everything including image and plain test pasting are all working perfectly. But while online, the image uploading and test pasting stopped working. Pls, can anyone be of help

remember that the image is uploaded to a directory on your server and you need to reference that path as you did reference the local path on your system during testing.

check to see if the path to your images is relative (eg. images/sample.jpg) or absolute (e.g http://www.mysite.com/images/samples.jpg)

if it is absolute, check that it's not pointing to localhost else check that the files are actually where it's pointing to
a smart way to check is to rightclick on link or images, copy and paste path in browser.

Moving you to the right board