Dll und Klassen

[ATS3788]

Delphi-Quellcode:

var
_GifImage     : TGifImage;
begin
try
_GifImage := TGifImage.Create;
try
    TheStream.Position := 0;
_GifImage.LoadFromStream(TheStream);
Image.Picture.Graphic := _GifImage;

das funktioniert in der DLL

Delphi-Quellcode:

var
_GifImage     : TGifImage;
begin
try
_GifImage := TGifImage.Create;
try
    TheStream.Position := 0;
_GifImage.LoadFromStream(TheStream);
Image.Picture.Assign(_GifImage);

das nicht.

Kann mir jemand sagen warum?