You said that you just contributed a powerpoint today. To get points you have to wait for others to download them. The number of downloads will be converted to points in your account after one to two days - at most - according to time in Spain. You are from KSA, then you will get points - if yours has been downloaded - at 2:00 Am (in Ryadh) on Saturday 02/01/2010.
Just be patient.
Once you get your points, you will be able to download whatever you like paying 1 point per download.
Keep contributing until you get 30 points to be a premium member and have access to 30 free downloads of daily contributions.
Yours,
DT