[U-Boot] MPC8313ERDB board reset problem

Hi im using mpc8313erdb board. and i have modified the u-boot 1.3.0 code to suit my needs. But the problem is that now as soon as power up the board, the initial msgs are dumped on the telnet...and then as soon as the prompt is displayed....it resets....and keeps on doing the same... the thing is i dont know what change has caused this....it would be of great help if anyone can guide me identify wat component have i messed up...

thanks and regards in advance Deepak Gopalakrishnan