Thanks for your interest in supporting those in need. Almost every cause is a worthy cause. Unfortunately, most of our members have people groups, organizations or situations that are important to them. If we let one person raise money for her good cause then we have to let every one raise money for their good causes too. Although you probably have an extremely worthy cause, we can't allow the request for donations.
You may talk about the need and let people know that you are giving or participating with it. You may let them know that they can PM you with any questions or more information.
But there should be no requests for money, donations, or financial support in the open forums.