*bangs head against wall*

To each problem its solution.

P. PJ's pants falling down because of a broken elastic.
S. Find pin-like thingy and pin the b**** !

P. Printer absolutely refuses to print purple.
S #1. Live with it. Maybe it's the cartridge that's defective. You have no way of knowing.
S #2. Print a lot of pink so you'll end up using the damn cartridge anyway. Then buy a new cartridge, see if it works. Get back to me afterwards.