Legend not sizing properly

[User (Legacy)]

I'm having difficulty with sizing the legend box appropriately. When I first 

generate my graph, the legend box (docked to right of window) is HUGE, 

taking up over three quarters of the window, regardless of the size of the 

text it encloses. If I re-dock the legend, it sizes perfectly, as it does if 

I generate the same chart a second time. 

The final manipulation of my chart object before displaying it (after all 

the series have been added) is to add the legend box: 

 // set up the legend. (using VC6, DLL) 

 pChart->SerLegBoxObj->PutAutoSize(TRUE); 

 pChart->SerLegBoxObj->Docked = TGFP_RIGHT; 

 pChart->SerLegBoxObj->MultiLine = TRUE; 

 pChart->SerLegBoxObj->Visible = TRUE; 

Any idea what could be causing this? 

Andrew