卸载自己写的Bpl控件, IDE崩溃了, 咋回事?

控件是从TEdit继承下来, 有个初始化动作, 调用了DLL, 但是DLL跟BPL在同一个目录, 安装控件没问题, 卸载时, IDE提示异常, 然后就崩溃了. 代码如下:unit QEdit1;interfaceuses
  SysUtils, Classes, QControls, QStdCtrls;type
  TEdit1 = class(TEdit)
  private
    { Private declarations }
  protected
    { Protected declarations }
  public
    { Public declarations }
    function Initialize: Boolean;
  published
    { Published declarations }
  end;function  COMM_Initialize: Integer; stdcall; external 'comm.dll' name 'COMM_Initialize';procedure Register;implementationprocedure Register;
begin
  RegisterComponents('Standard', [TEdit1]);
end;{ TEdit1 }function TEdit1.Initialize: Boolean;
begin
  COMM_Initialize;
end;end.