just - update your krpano version, there that loadpano() busy can't happen anymore ,
in the older versions the "loadpano() busy" warning comes when trying a load a pano again during the blending to an other pano, but in the new version the loadpano() is now working always and every time,
I replaced the swf file in the server but LICENSE ERROR displays!
Then I tryied to drag license files with the other files but it continues to display LICENSE ERROR...
please try to explain detailed step by step what you done, normally there should be no license error of course. Or try to use the krpano Update Tool to update your existing files automatically.