Unable to add new sermons

I am running Joomla! 2.5.19, PHP 5.4.18 ,SermonSpeaker 4.5.8 and Joomlashine jsn_solid_pro template.
Development currently on Localhost.

I have successfully added speaker, categories, series, tags and one sermon.
My sermon files are pre-loaded in a root/sermon/*.mp3.

When I add a new sermon and press save /save & close / save & new, it starts saving and then freezes on a blank screen. To exit, I have to press the close button. It then returns to my input screen.

If I press any of the save options, I get two errors (not at the same time) "you are not permitted to use that link to directly access that page (#5)" and "Save failed with the following error: this alias is already used by another item"

I have checked privileges - currently super user with maximum privileges. Also tried different alias, with no success.

On closing the form, I can see all of the new sermons in the back-end, but nothing on the front-end.

I have attached a file with a few screen prints

I would appreciate your assistance.

Hi Rocky, I've noticed this happens sometimes with IE. Try using another browser, it seems to solve the issue.

Generally speaking:

• Blank screens usually are generated by a PHP error. Enable error reporting in the global Joomla config and you should see an error message. Or check the apache error log
• The error which says "you are not permitted..." usually comes from using the back button on your browser. Joomla has some security checks when dealing with forms. Accessing a form directly without going properly clicking an edit link usually gets you this error
• The error with alias means that the alias you wanted to assign to the sermon already exists. This has to be unique.

Thank you for the quick response.

My error reporting is enabled. Can't see anything there.
You are right about the back button being used. But it is the only way to return to the system. I have restarted apache, etc. closed Firefox and still have the same problem. Also have the problem on front-end upload. Not sure where to go to next.
I have found the answer to the problem of only certain items appearing. Only one category appears under the root. I have selected "ALL" sub category levels in "SermonSpeaker Options", but can still only see one category. I have two categories (Morning, Evening) nested under "Sermon" as the root category.

I have also noted that there is no field to add tags to the sermons.

Thank you Andrei. I am using Firefox in this instance.

Does it behave the same in backend and frontend?
Do you have some special plugins active which could produce this error?