vb.NET RTB rtf

[Subu Mysore]

Hello,
I am saving the text in a Rich Text Box(vb.net) into the DB. It saves fine..(Datatype--long text). The text has modified appropriately in the DB.
But, when I try to retrieve it, it says, invalid format or cannot convert to integer or some vague errors...Please help

Here is the Text

RE: MANUELA 0DE LA HOYA
DOB: 07-16-1927

Dear Dr. :

Thank you for your kind referral of Ms. MANUELA 0DE LA HOYA, who is 81 of age. PAST MEDICAL HISTORY: n/a


Here is the code
Me.rtb_Letter.Text = myDataReader.GetString("CONTENT")
Dim xx As String = myDataReader.GetString("CONTENT")
Me.rtb_Letter.Rtf = xx