I re-wrote a program to use transmit buffer,simulation is perfect but when I load it on the 2051 chip there is nothing

I checked for hardware problems by using a piece of code , no problem the program is able to send hello world easily.

Instead of hogging the space at this forum I have posted my code on my webspace
http://www.ikraft.biz/netbaba/p...serpat.asm


what's the problem ?

Deepak