Re-Partitioning to Different Sizes Not Working?

Even though I've erased and re-partitioned my hard drive several times and restored the Windows partition, I can't seem to make it larger. When I am prompted by Bootcamp to select how large I want the partition to be, I tell it to make it 90 GB, but every time it makes it only about 40 GB, 38 of which is 'filled up'. Every time I run Windows its impossible to save work or download anything with only 2 GB of space open. What am I doing wrong?

I've backed up with WinClone, erased, partitioned with Bootcamp, and restored. What am I doing wrong? Every time it makes the Windows partition the same size no matter how large I tell it to make it.