Chilli plant's stopped making fruit?

[alistair2905]

Had a chilli plant that was already established as a gift which I had some good fruit off in abundance. I then decided to move pots and got some good compost and a little tomato feed which made some more even bigger chillies for a while. Now I have harvested all the chillies and it's just stopped growing any more of them. The nodes where the old chillies came from now seem to be trying to do what looks like growing but then they just dry out and crumble into the pot. I treated it a month or so ago with and insect repellent which my friend suggested as he used it on his tomato plants. But now I'm stuck. Surely it should be ok growing in the kitchen window which does get some sun especially with all the good weather we have been having. and occasionally I have had it outside on the garden table when it's been hot. So really I'm wondering what the heck I need to do to enjoy the last couple of months of fruiting season.

Thanks