hey, i had the same error (also same mobo as well. and I have Win 7 x64 too)
go into your bios and set the option to "IDE"(w/ legacy support enabled, at least that's what i did but I am not sure if that made any difference) instead of "AHCI" then restart and let the firmware CD runs itself.
That is what I did to get it to work. The firmware setup should be able to see your SSD now.
[Edit] Right after you do firmware flash, go into Win 7. It will ask you to restart, do the restart. BEFORE it boots back into Win 7, GO INTO BIOS, and SET your option back to AHCI from IDE. (I read about this somewhere here or some other board online but I think this is crucial part, maybe not but I think you should do this as I read that the Intel Trim command works only under AHCI? not 100% sure but just to be on safe side, you know.)
p.s. I guess I am lucked out as my Win 7 rebooted fine and I ran few games and it works fine. Also ran the Intel SSD toolbox thingy to "trim" the SSD and my SSD got faster (it was @ 229 mb/s but now it's @ 240 mb/s) Hope you get thig sorted out.
I have an X25-M "G2" 80G SSD. Running the toolbox on Windows XP Pro SP3 it says "Error Connecting to Drive" under the "drive selection".
The non-SSD SATA hard drive is greyed out but has the same status of "Error Connecting to Drive".
If I click on refresh, the 3 of the 5 function buttons display "Intel SSDs Only". The SATA controller is an NVIDIA nForce 430/410 Serial ATA My guess it's related to the SATA controller. I don't see any options in my BIOS for any sort of compatability IDE mode, etc.
The SSD works flawlessly. I'll wait for things to settle before trying any updates.
I removed the NVIDIA driver (deleted in device manager) and the toolbox works.
See the following thread from the Intel folks.
http://communities.intel.com/message/71325#71325 (shortcut on rt side of of the screen in this forum)