Kernel failed to boot when add more drivers

[Martin Peevski]

     Hello! Can you, please, help me!

     I'm building Linux Kernel version 2.6.39 for at91sam9x5ek. When I 
want to add more drivers the U-boot is imposible to load the Kernel 
because CRC error. The size of the uImage is 2.38MB. When I remove some 
driversand uImage become around 2.31MB the Kernel is loading 
successfully. Do you know what is the reason, I want to use more drivers?

     Many thanks!
     Martin Peevski.