Adding copy and paste information from sites to wordpress not loading

I am having trouble copying and pasting information from old site to new site in the admin section. It loads fine but once you publish it to web site and then i have a preview of property details, the text is not there as if was not loaded.I am being told that the text has to be converted to plain text which i have done but again after adding the paste information and publishing it does not load.

Does anyone have a solution to this or experienced the same problem.
Thanks.