If I try to "extend volume" it gives "not enough space on the disk(s)"

Here's the story. I bought this new Samsung 840 250GB SSD.
I first did a clean install of windows 7 on it and it worked fine. Windows installed without much problem and everything. Then something didn't look right about the partitions. It looked like because I had all my HDDs connected while installing windows on the SSD the windows created the system reserve on the old HDD rather than the SSD. So I went back and decided to start from scratch with all the HDDs except for the SSD disconnected. I tried reinstalling windows on it but this time it didn't work. I tried formatting the SSD and it just gave me an error saying windows couldn't install on a GPT disk. I went into bios, made sure the PC was booting from the UEFI DVD drive and it still kept giving me the same error.

So I then booted up my old HDD. I tried formatting my SSD and now I can't delete the partition!
This is what my disk set up looks like:


If I click "extend volume" on the "New Volume (G:)" disk, it says "there is not enough space on the disk(s) to complete this operation".
If I try to create a "new simple volume" on the "unallocated" partition, it says the same...

Have I destroyed my new SSD now?! I just want it to work like a new clean disk...