Problems with Mon51 connection using AT89S53 through RS232

I'm using keil c51 7.06 My Problem is that uVision always shows monitor 51 not connected. I use RS-232 interface and ATMEL "AT89S53" Could anybody help me? RAY
Problems with Mon51 connection using AT89S53 through RS232

I'm using keil c51 7.06 My Problem is that uVision always shows monitor 51 not connected. I use RS-232 interface and ATMEL "AT89S53" Could anybody help me? RAY
MON51 connect problem

Now I had burned MON51 into ROM , I use DR8051 as my CPU , but when I start debug , it always show the message " Target DLL has been cancelled , debugger abortedd" Could someone tell what's wrong...
MON51 connect problem

Now I had burned MON51 into ROM , I use DR8051 as my CPU , but when I start debug , it always show the message " Target DLL has been cancelled , debugger abortedd" Could someone tell what's wrong...
MON51 connection with EZUSB-FX board

Hi, I am using EZUSB-FX board evaluation board. I am not able to communicate to Board through MON51. Please help me.I tried all the seting and everything but still I face the problem.Please help...