rb532 bios problem

hi all. it is my first post
need help

router rb352,
after installing 3.30 software I can’t enter bios setup

RouterBOOT booter 1.5

RouterBoard 532

CPU frequency: 264 MHz
  Memory size:  32 MB

Press <delete> key within 2 seconds to enter setup..
trying bootp protocol...........................................................
................................................................................
................................................................ failed
kernel loading failed

after pressing key nothing happenes

thanks for answers

somebody knows how to update to the latest bios version this routerboard ?