Widget Problem

Please forgive the rookie question, but I’m having trouble with some plugins. I normally download, then upload to the correct folder on my website, then ‘activate’ from my Manage Plugins, then click over to the Widgets tab to drag and drop/configure.

Some recent plugins never make it to the Widgets page even after being activated. My question is… why?

I’m thinking perhaps I already have the maximum number of Widgets? I’ve got 15 listed there so the list looks full. If 15 is the maximum, then I’ve got another question… why can’t I remove some Widgets/Plugins? I go back to Manage Plugins and choose “Bulk Actions”->Delete, and nothing happens. Seriously… why?

If it helps, my latest plugin that won’t turn itself into a Widget is “Simple Counters”. And the latest plugin that refuses to be deleted is “JR_Twitter”.

Any help/advice/smacks on the head appreciated…