Hi,
Installed JbLibrary 1.2.9 and Slideshow 3.3.8 for a Joomla 1.5.15 site (old one). After configuring everything seems ok. Want to test it for a new home page in the right position. But during the test, I got the error.

Ooops. It looks like JbLibrary plugin is not installed!
Please install it and ensure that you have enabled the plugin by navigating to extensions > plugin manager.

However, JBLibrary plug-in is enabled, and seems OK.

For other hostings and websites it's working fine.
Is there a certain requirement needed (php,) ?

Hi there,

It could be that it didn't install properly. You should try just installing it again and seeing if that fixes it.