Asus Ez Flash 2 Security Verification Failed

Hi, i am having problem adding slic22 into asus a88xm-plus. the phoenix tool reported slic22 successfully added. but when i was trying to flash the modded bios into the mobo through ez flash 2. it reports: security verification failed. and just won'nt let me flash the modded bios. i also tried with asus's bupdate.exe under dos.. 1) download the lastest bio from asus web to your harddisk 2) download also the rom to cap converter 3) download brenamer from asus web also 4) convert the bio rom to cap file using the rom to cap. What