hey welcome to the forum!
Well I had this problem with my ps1, I turn it on and all my games were gone. I'm not sure if this happened to you but I turned off my ps1 while it was saving and all my games were gone, so do you remember shutting down the psp or the battery died while it was saving or mabey (im not sure if it applys to ->) when it was loading. Theres been some problems with the 1.5 firmware and the emulator but that wouldnt erase anything. Thats all I can think of.
there are some threads here that will help with putting the emulator back on your card
Sorry about that, thats a bummer. so good luck with that.
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