Memory Stick wont read

Firstly, can i just say that if this has been covored before, im sorry, but i havnt been able to find any thing to help me.

Yesterday, I was happily using my psp, running a game from a memory stick, when my battery died.
Thinking nothing of it, I plugged it in to find that the psp would no longer read the memory stick itself, or even say that its THERE, all it does is the yellow light that comes on when its reads the card is just flashing on and off.
When i connect the psp to my pc, it still says theres no card there.

Please can anyone help me?

Hi I have had exactly the same problem as you posted back in July, did you mange to solve it? and if so can you help me please...

Your memory sticks have been corrupted. It happens when power is removed the memory stick in the middle of a write. You will not be able to fix it if it is not recognised in a PC. It will have to be replaced unfortunately.