Unable to add selected web part

Mar 11, 2008 at 1:58 PM
I installed Return of SmartPart on the Share Point server and tried adding the SmartPart on the Share Point page as a web part and I am getting an error.

The error is SmartPart: One of the properties of the Web Part has an incorrect format. Windows SharePoint Services cannot deserialize the Web Part. Check the format of the properties and try again.

I installed the Return of SmartPart and tried to add it as a web part and got the error. Any ideas?