Found the issue after much trial and error. Good for others to know.
Version 0.7.3 of WP-Ad-Manager prevented my WordPress v3.3.1 from saving any data. Every time I activated the plug-in, the saving of data stopped. I deleted the v0.7.3 and upgraded to v0.7.5 of the WP-Ad-Manager. The new version didn’t block the saving of my data and everything is working great.
