Ideablade and image data type in SQL Server

   I have a table that has a image data type.  Object mapper sees it as a byte[].

Here is my code to retrieve it.

RdbQuery query = new RdbQuery(typeof(MemberDocument));

query.AddClause(MemberDocument.DocumentIdEntityColumn, EntityQueryOp.EQ, id);

MemberDocument document = myPM.GetEntity<MemberDocument>(query);

byte[] imageData = document.DocumentImage;

MemoryStream mem = new MemoryStream(imageData);

return mem;

In my form I have the following

MemoryStream mem = myController.GetScannedImageById(id);

pictureBox1.Image = Bitmap.FromStream(mem);

I keep getting a parameter not valid when it tries to display it in the picture box.  Am I retrieving it properly and assigning it properly to a memorystream?

Bill