FileColumn

Hai every one
I have problem in File Column
I could not upload files using FileColumn
I got this error

<< Do not know how to handle a string with value
‘F:\Hussain_Private\DATABASE.JPG’ that was passed to a file_column.
Check if the form’s encoding has been set to ‘multipart/form-data’ >>

I have added the plug-in
i have added the validation in model
i have added the form as multipart

but i dont know,what is the problem
tell me if anybody knows

ok
Bye
By
P.S.Hussain