thank you so much and will surely consult you if i have any doubts....
Added after 4 hours 55 minutes:
hi salma..
I am using XILINX 8.2i,XPS 8.2i.
i opened the XPS by double clicking the icon the desktop->selecetd base system builder->created a project->selected "I would like to create new design->
board vendor :xilinx
board name : virtex ML402 Evaluation kit.
board revision :1 -> it automatically selected microblaze->ref clock fre:100 MHz,processor bus clock frequency 100MHz,
Processor configuration :On chip hardware debug module,
Local memory :8KB,Cache setup:no cache-->RS232-UART ,baud rate 9600,data bits 8,parity none-->(AFter this i did not select anything,that is i disabled everything every perpheral and directly went to "DEVICE TO UTILISE FOR STANDARD INPUT AND OUTPUT,ENABLED memory test,peripheral test,
clicked next did not change any default values--> clicked GENERATE--> clicked finish..
the next step---> START USING PLATFORM STUDIO..
after this i directly went to HARDWARE and clicked GENERATE NETLIST..
netlist was created and after this step i clicked GENERATE BITSTREAM..this bitstream was showing errors..
saying that there is no module present..
please tell me where did i go wrong??
thank you in advance..