Here is my setup

Joomla 3.0.2
K2 2.6.2
JCE 2.3.1
K2 Links for JCE 2.0.0
PHP 5.3.8

I installed the K2 Links and in the JCE Link interface I can see the entry for K2 Categories & Items. When I click on "K2 Categories & Items" the wheel just spins and none of my K2 items are populated, it just hangs there.

Any suggestions on what could be happening or how to fix it?

Thanks! -- Steven