I just buy and installed the joomlsef4,when the installation completed ,it displayed:

Error loading component: com_sef, 1
Installing component was successful.

please see it in the attachment.

Then I can not use the joomsef component ,when i click ,it display emty page,

wish you help me to fix it,thank you very much.

note:before I use the free version of joomsef4,it worked well.

thank you very much.

Hi,
It seems that this is caused by some corruption in Joomla's database table for extensions. Can you uninstall JoomSEF and reinstall it? What version of Joomla do you use?

uninstall and reinstall not works, my joomla is 2.5.1,
confused ~~~
another question ,when installed ,the backend can't check the update information .see it in the attachment.
thank you very much.

Uninstall JoomSEF, make a backup of your database in case something goes wrong and try using phpMyAdmin or some other tool to access your database directly, open the "(prefix)_extensions" table, and find and delete any rows which contain type=component AND element=com_sef, and also delete all rows with type=sef_ext. Then try to install JoomSEF again.

As regards the update check, try purging the cache on Joomla's extensions update page.

Same here. Joomla 2.5.1 as well.
But isn't there another way to solve this?
I don't really feel comfortable with tempering with the database.

Sorry dajo ,
but after log in phpMyaDmin,there are no any element like "com_sef"and "sef_ext"in extensions table.

and now when i want to install the free version of joomself,it happened to have the same question.

Jacky