Hi i have some problems with my latest version of joomla as i tried to upoad a flash file into an article which i pasted the flash code there but somehow there is only a box but the flash file is not visible and i have already uploaded the flash file onto the server, any help please, thanks

Try going to Add New Content. Then, in the WYSIWYG editor, there is a Flash button (represented by te Flash .swf file icon), click on it and follow the steps from that. I think you will need to upload your .swf file first and then provide the external link to it.

You don't need to directly place <object> tags into the source code for it to work.