Thank you Daixiwen for your help. but i thought as we can download the software from the altera website they'll also provide a 30 day trial (evaluation) license.
Actually, Our university has bought the Altera Cyclone II DSP developoment board and with the CD s for installation were given which included Quartus II version 6 design software( 2CDs), NIOS II Embedded installation CD, Megacore IP CD and DSP builder CD. Mathlab version 6 CD was not present so i installed MATLAB 7.1. I have succesfully installed the CDS except the NIOS II Embedden CD. The problem is in the altera DSP Builder toolbox in simulink under the section boards , the board " Cyclone II EP2C70 DSP board " is not present only " Cyclone II EP2C35" board is present. How to include " Cyclone II EP2C70 DSP board " in the simulink as we have that board only. Do u know how to do it?