This is the content of hex file. Save it in notepad with .hex format before burning it to your controller. Also I use at89s52 controller.
:0F08AE006275737479206B69206D6973747900BA
:100800007508FF750908750AAE12088BE4F50BF53B
:100810000CAB08AA09A90A850C82850B831208363D
:10082000FF60113395E0FE1208DF050CE50C70E166
:06083000050B80DD80FED7
:08086300C294D2967F017E00D1
:10086B00E4FDFCC3ED9FEC9E5015E4FBFA0BBB00C3
:0F087B00010ABA04F8BBFBF50DBD00010C80E4C7
:01088A00224B
:0A08D500D293120863C29602086B6A
:0C08BD008FA0C293120863C29602086B61
:10088B007F387E001208BD7F0E7E001208BD7F01EF
:10089B007E001208BD7F067E001208BD7F807E00A1
:0308AB000208BD83
:0508DF008FA00208D506
:030000000208C92A
:0C08C900787FE4F6D8FD75810C02080071
:10083600BB010CE58229F582E5833AF583E0225077
:1008460006E92582F8E622BBFE06E92582F8E222C1
:0D085600E58229F582E5833AF583E49322DB
:00000001FF