Loading Bitmap

Hi,

I am developing a sample game of arkanoid. I displayed the whole GUI using draw function n making eclipse but i want to display the same by using bitmap but while do so i am getting an error in enum value ie

CWsBitmap* neb = iEikonEnv->CreateBitmapL(_L("\\resource\\apps\\animation.mbm"), EMbmAnimationNebula);

for loading the bit map i have add following codes::

in mmp file

start bitmap DemoBitmap.mbm
header
sourcepath ..\gfx
source c8 bricks.bmp
end

LIBRARY fbscli.lib
LIBRARY bitgdi.lib
-----------------------------------------------------------
In AppView

// in constructL
void CBrickGameAppView::ConstructL(const TRect& aRect)
{
// Create a window for this application view
CreateWindowL();

// Load in the bitmap images from the multi bitmap file
_LIT( KFullBitName, "\\resource\\apps\\Try.mbm" );
TFileName filePath( KFullBitName );
User::LeaveIfError( 0 );

iBitmap = new (ELeave) CFbsBitmap();
User::LeaveIfError ( iBitmap->Load( filePath, EBitmapDrawViewId1 ));

// Set the windows size
SetRect(aRect);

// Activate the window, which makes it ready to be drawn
ActivateL();
}
- - - - - - - - - - - - - -- - - - - - - - -
In Draw
gc.Clear(aRect);
gc.BitBlt(aRect.iTl, iBitmap);

but its not displaying anything
and sometimes it show error as BMCONV failed and sometime as mbg file not found while its creating .mbg file

Can anybody help me what wrong I am doing and whats the error in my code.
If not so the plz tell me step by step process of loading bitmap.
I have already spend a whole day in doing soo
reply ASAP, its urgents.

Thanks and Regards
Amrish