Well even if the macro mode on the A95 works extremely well, don't forget that you must leave at least 5cm (if I remember correctly) between your camera and your subject. Also, if there's not anough light, you'll have to take the picture from a little farther away.
That being said, dont forget to :
1- make sure the little flower appears on your screen (which confirms that you're in macro mode).
2-Before taking the picture, half press the shutter button in order to let the camera focus on your subject. Without releasing it, when the subject is well focused, keep pushing down the button to take the picture.
Let us know how it went