SSD and Harddisk showing up in red after install of 2nd Drive

Hi,

I used the ifixit Dual Drive Kit to add a Samsung 840 Pro 256 GB SSD to my Mac Mini 2012 (i7, 2,3 GHz, 1 TB HDD).

After the install I wanted to format the SSD and the Disk Utility said that I have to initialize(don't know the exact word) the drives. What happend was that the Disk Utility built a Fusion Drive out of my SSD and HDD. This was not what I wanted so I googled and found an article how to revert the Fusion Drive with diskutil and how to delete the Core Storage Entry.

Now I see both disks again, but both are shown red, and I can't repair them, can't format them, When I click on a drive I get a popup that i have to "initialize the drives" then I have to options Ignore and Fest but none does anything.

I can partition the HDD with the diskutil tool, after which it still shows red, but when I try to partition the SSD I get just an error number like -66789 (number is not correct but something like that.)

Any ideas what i can do?

thanks

Frank