The reasons can be found here

Hi guys. Will O the Whistle has been take off of hiatus. I plan to get a chapter or two up this weekend, if Mother Nature cooperates (AKA, we don't get a ton of snow) and work goes well.

Hi guys, and girls, I am sorry for the lack of updates so far. I have had writers block lately. Soon, I will have a new chapter up. Most of the problem is changing names, since I am writing this as a non-MLP:FIM story, too. I was wondering if you could help me with names. I'll give you credit for them.
The lack of updates has also been caused by things at school, including the upcoming graduation, applying at tech school, and finding a summer job.