Oil of Wintergreen

Yesterday in Science we did an experiment. However, we didn't end up with the product we wanted.

Equipment
Beaker
Measuring cylinder
Bunsen Burner
Gauze mat
Test tube
Heat pad
Test tube tongs
Dropper

Acid
Salicylic acid, methanol & sulfuric acid

Method
1. Weigh 0.25 grams of salicylic acid into a 10-15 cm test tube. This weight does not to be recorded.
2. Add 2.0 mL of methanol to the test tube and swirl until the solid dissolves.
3. Slowly add 10 drops of sulfuric acid.
4. Place the test tube in a hot water bath and secure by using a utility clamp and heat for 15 minutes.
5. Cool the test tube in running water.
6. Smell the contents by wafting (wave a hand over the top of the test tube to direct any fumes) and record any observations.

What happened? We didn't end up with the crystals intended. Instead, we ended up with a black liquid.
What should it look like?  It should look like white crystals.
What could we change/try? The amount of acid we put in.