initializing ram with hex file

hi i have an error :

Error: Generated checksum value does not match the value specified at line 1 in Hexadecimal (Intel-Format) File "Look1.hex" http://www.alteraforum.com/forum/../proweb/misc/progress.gif

can you help me i change the .hex file for an on-chip memory with result of code matlab i wanted to change the contents of memory with data wich i generated with matalab