wxBoxSizer (horizontal) won't expand vertically?

[Armel Asselin]

Hello all,

I'm trying to use two sizers (the outer is vertcal, the inner horizontal), 
as this:

ICON       TEXT
       ANIM
       LINK

with following code:
wxBoxSizer *sizer = new wxBoxSizer(wxVERTICAL);
wxBoxSizer *hsizer = new wxBoxSizer(wxHORIZONTAL);
hsizer->Add (icon = new wxStaticBitmap (this, ECSPID_Icon, wxNullBitmap),
    0, wxALIGN_TOP|wxALIGN_LEFT|wxALL, 5);
hsizer->Add (label = new wxStaticText (this, ECSPID_Label, message.wx()), 1,
    wxALIGN_CENTER|wxEXPAND|wxALL, 5);

sizer->Add (hsizer, 0, wxEXPAND|wxALIGN_TOP, 0);

sizer->Add (progress_ctrl = new wxGIFAnimationCtrl (this, 
ECSPID_ProgressAnim, animation_file_name.wx()),
    0, wxALIGN_CENTRE|wxALL, 5);
sizer->Add (help_link = new wxHyperLink (this, ECSPID_HelpLink, 
help_message.wx()),
    0, wxEXPAND|wxALL|wxALIGN_CENTRE_HORIZONTAL, 5);

the hsizer vertical size won't expand when the static text is wrapped (being 
higher than the icon)...
what do i do wrong?

please help, thx
Armel