hi burhan….thnx fr the reply..i have already uploaded the simulation file in one of the comments and i dont know why r u not able to open it..i dont whats the problem…first problem i faced was with uploading the picture and then simulation file bt then i succeeded i dont know whats happening nw..plz u try downlodng it agn may b this time u ll be able to download it and open it…thanx agn