Form Text Box to Table Memo Field?

I have a Text Box on a Form. I've entered 800 characters into the text box
(in this example). The problem: When I use and UPDATE query and SQL
statement to update a Memo Field in a Table with the information in the Text
Box, only 1/2 of the characters are updated ... the remaining text is
trncated to garbage text. This is consistent, regardless of what I enter.
The Text Box has no formatting (defaults).

Does anyone have know how I can copy a Text Box on a form to a Memo Field in
a table? I'm opent o anything (changing it from a text box, etc.), but I'm
lost on how to resolve this issue.

Thanks, in advance, for your help.

GH