How can I get my new boss to utilize my knowledge and skills.
Quick answer, you can't, unless he wants/decides to.
Read any of my postings and you will see I have been in the same situation. It's not only frustrating, but mind-numbing.
Firstly let me remind you something that most females forget - men feel intimidated by women, especially women who have better IT and organisational skills. I bet you any money your boss would rather flaff around his pc than ask you how to do something. I've seen it before. Knowledge is power.
Secondly, they don't want you to progress and develop, they want you to remain in the position they hired you for. Your job (to them) is not to come up with ideas or solutions but to be the PA who sits at her desk and does her job - don't interfere, don't get involved.
I am not belittling you in any way because I've experienced the same, but it happens in the workplace regularly. The bottom line is men feel insecure when they think that women might have a brain!