Bulldog Paph, nice foliage, no bloom?

[krienschmidt]

I was wondering if someone can give me some insight on my Bulldog Paph. I got this paph one year ago while in bloom. It has since grown one large new fan and has 2 smaller fans growing in. There is something in the middle of the large fan that I had hoped was the start of a flower spike but it has remained just this little nub, about the same size for over 2 months. Is this a flower spike and if so why is it not growing in? What am I doing wrong? I am pleased with the foliage growth and appearance, so I don't understand why I'm not getting a bloom. I have it in a south window with a sheer curtain but my climate is cold this time of year. Maybe it's too cold by the window?? Please see attached pictures. Thank you for any help.