New cpu, stuck at bios screen

Okay, so I bought a new cpu , I used to have a intel e2140 , my motherboard is an Acer F672cr, so I got the best thing i could get with 800 mhz fsb I got the intel E 5400 , Now i put in the new the new cpu , turn it on , nothing happens except all the lights turn on , so I post on some other forum apparently I have to flash my bios to the newest version , i do that, computer turns on i get bios screen, yay its working , 5 mins later, still stuck at the bios screen, ive tried everything, ive tried reseating everything, I tried taking out the battery to reset the bios , I flashed my bios , the weird thing is too is when im at the bios screen my keyboard wont work, and also when i switch back to my old cpu it works perfectly fine , infact im typing this on my old cpu

anyways here are my specs im starting to think something else isnt compatible

Cpu: intel pentium E2140 socket 775 65nm 1.152v
motherboard: Acer F672cr
Bios: Pheonix version r01-b1
Memory: ddr2 2x 1gb 333 mhz (pc2-5300)
Graphics card: evga geforce 8800 gts 640mb

any tips or ideas on how to fix this would be amazing

it really is acer lol, it only supports 800 fsb , and the e5400 uses the same voltage than my current e2140 only different is the nm my current is 65 and the e5400 is 45 , which as I understand is fixable with a simble bios flash, which I did, but i got it from the acer site and the date on it is from august of last year, ill try looking around if i can find another one thats newer