Disadvantages with Store Procedure [closed]

I'm doing an SP to perform a specific search with parameters, but it brings me the following error. How to solve it?

  

Msg 137, Level 15, State 2, Procedure spPantallaTasa, Line 6   Must declare the scalar variable "@aseguradora".

     

Msg 137, Level 15, State 2, Procedure spPantallaTasa, Line 10   Must declare the scalar variable "@aseguradora".

SQL:

CREATE PROC spPantallaTasa
@asegradora VARCHAR(20)
AS
    IF (@aseguradora = 'Caracas')
        BEGIN
            Select Año, TipoCotizacion, Estatus, TipoVehiculo, SubTipoVehiculo, ClaseCompañia, Zona 
            FROM [dbo].[RelacionClaseTasa], [dbo].[MPF_Tasas]
            WHERE Aseguradora = @aseguradora
        END
    ELSE
        BEGIN
            SELECT 1

        END