First of all, please post the exact names shown in the "OSD" (PS2-Original-Browser/Menu).
You placed your files "Install-Files" on the same mc, where you wanted to install FMCB?
That won't work and it is just logical, that it won't work after a format.
PS2 V7/DMS3 V2 (FW:2.4b7); Seagate Baracuda 200GB
PS2 V7/CC1.0 (FW:34 hacked v2 BM:2.1.6); Maxtor DiamondMAX9 PLUS 160GB
PS2 SCPH-30004R; NoMod+NoLaser
3xSony MC 8MB
MAX/Datel 16MB with Boot-CD
Custom FMCB 1.8b+ Beta-Build, my AIO 0.5, Sony&xRhino-Linux