WordPress connection API call

“An+error+was+returned+while+making+a+WordPress+Connection+API+call.++Details+(loc=listDir):”

I had installed wordpress easy rotator. I uninstalled it and tried something else. I went back to installing the rotator again and was trying to use it in the widget area and this error message is what I got. I had successfully used it before I deleted it. I did install a wordpress cache type of plugin in between the delete and reinstall. Don’t know it that helps. Please let me know if you have a solution.

Thanks,
Pam