On some of my older revolvers, I've found that old oil or grease inside the crane has made them hard to open. I've had success doing the following:

1. A quick shot of a cleaner with dry lube (I like Hornady One Shot) on both sides of the crane where it goes into the frame.
2. Let sit for a few minutes, then gently swing the crane on its axis back and forth (like opening/closing the revolver for loading/unloading).
3. Repeat a few times, especially if dark gunky stuff starts oozing out (that's the old oil or grease being dissolved).

Be aware that some cleaners are not good for some finishes or materials (such as plastics), so read the manufacturer's warnings prior to purchase or use.

Good luck, and I hope you enjoy your .32!