Hello

Sorry but my english is very poor.
My question is very stupid.
I'm trying MM.net 3.5 evaluation version.
I'm making web form when I´m inserting new record. The application displayed this error exception. "NullReferenceException was unhandled by user code"

this is the error image http://www.lmpetek.com.ar/mm35/inserterror.png

is this error may be a evaluation version?
This error does not occur when the version isn´t evaluation. Thanks to Juan Calcagno for your help.