well first off, realize that flytraps are carniverous BECAUSE they live in nutrient poor soils, the there is always this battle for them to get enough energy to do what they need to, whether it be flowering or growing traps...
Now, the re-opening of a trap is a growth process, if your plant is growing a flower stalk, and trying to grow a trap back open, it is most likely that the plant will put the growth energy into the flower, and not the trap.
Also realize that traps work about 3 to 4 times before they cease to trap insects and become just an odd looking leaf.
If you really want seed, then leave the stalk, but if your plant is experiencing other problems, I would sacrifice the stalk for the sake of the plant.
Flytraps flower in the spring, sometimes in the fall, and when they are stressed and think they are going to die... (You know, the whole pass on the genes thing...)
Can you descriptively tell us about your plant?
How old it it? Did you just get it? what is it planted in? What do you water it with? Is it in a terrarium? Is it in a window sill? Do you provide it with artificial light? Or does it get sunshine only? 3 hours of weak sun in the evening is not enough. Morning sun I think is the best, it's not as harsh, for you, a northern facing window with an open exposure is probably the best, but you need to heed the advice of your local aussies, it may get fried that way (not sure, I'm a Texan) We need to know everything you can tell us about your plant to give you a sure fire plan of action... though I can tell you this.
If the plant is flowering (Growing a stalk) and it is experiencing other problems, then save the plant, clip the stalk. If it lives, you can always have it flower again, if it dies, well.. no more flowering ever right?
Always err on the side of caution.